HomeMy WebLinkAboutStormwater Management Plan Technical Manual
Augusta Richmond GA
DOCUMENT NAME: s-\-o'('('()WG:te( mox,
t-ecro\CQj (Y)(J
DOCUMENT TYPE: r(De.(Y)O(Of'(iLffVJ
YEAR: C\,
BOX NUMBER: D ~
FILE NUMBER: \ ~~L\~
NUMBER OF PAGES: \ \l
p\an
'-.;;:
,'-
~;J0 # )~JI11
L-~,-(J-
OFFICE OF THE ADMINISTRATOR
.CHARLES R. OLIVER, PE CPA, ADMINISTRATOR
WALTER S. HORNSBY, III, ASST. ADMINISTRATOR
ROOM 801 - MUNICIPAL BUILDING
530 GREENE STREET - AUGUSTA, GA 309 f f
(706) 821-2400 - FAX (706) 821-2819
MEMORANDUM
TO: THE HONORABLE LARRY E. SCONYERS, MAYOR
MEMBERS OF COMMISSION
FROM: MR. CHARLES R. OLIVER, ADMINISTRATOR CLvJ
SUBJECT: STORMW A TER MANAGEMENT PLAN TECHNICAL MANUAL
DATE: OCTOBER 30,1997
Enclosed is a copy of the proposed Stormwater Management Plan Technical Manual for your
review. We are currently reviewing this plan. This item will be considered by the
Engineering Services Committee at the next meeting.
If you have any questions or I can be of any further assistance, please contact me.
CRO/mrk
Enclosure
xc: Mr. James B. Wall, Attorney
cro/may-comm{stormwater} 1027
-~I
~I
I
I
I
I
I
I
I
I
'I
-
:;,/ . "."
STORMW ATER MANAGEMENT PLAN
TECHNICAL MANUAL
. Prepared for:
Augusta-Richmond County Commission
July 1997
(logo)
I
.
I
I
I
I
I
I
I
Technical Draft No.4
August 22,1997
I
I
I
I
I
I
I
I
I
I
STORMW A TER MANAGEl\1ENT PLAN
TECHNICAL MANUAL
TABLE OF CONTENTS
General
Part I:
HydrologylHydraulics
Section I Determination of Storm Runoff
Section IT Storm Drains
Section ill Open Channels
Section IV Culverts
Section V Detention
Section VI Outfall
Section vn Special Basin Requirements
Part II:
Environmental Requirements
t~
'.
Section I Wetlands
,
i_
Section IT Water Quality
-
--
Section ill NPDES Permitting
I
I
.1
I
I
I
I
Part III:
Materials of Construction
Section I Storm Drains
Section IT Culverts
Section ill Soil and Rock Structures
Section IV Grassing
Section V Fencing
Technical Draft No.4
August 22, 1997
I
I
I
I
I
I
I
I
I
I
.1
I
I
I
I
I
I
I
I
Stonnwater Management Manual Table of Contents Continued:
Part IV
Soil and Erosion Control
Section I Soil and Erosion Control Plans
Section II Augusta-Richmond County Soil and Erosion Control Ordinance
Part V Maintenance
Section I Commercial Development
Section II Subdivision Development with Public Right-of-ways
Section III Private Subdivision Development
Technical Draft No.4
August 22, 1997
I
1
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I,
General
In order to comply with the Stormwater Management Policy adopted by Augusta-
Richmond County Commission, the following technical manual has been compiled to provide
engineers. developers, land planners, and others information necessary to construct publidprivate
facilities in Augusta. The goal of the stormwater management policy is as follows:
To develop a stormwater management system that is a feasible, constructable
system designed to collect, convey and release stormwater in a manner that
protects public safety, minimizes damage to all impacted properties, protects
water quality, and is maintainable in perpetuity.
The contents of the technical manual have been developed to establish minimum
requirements for the design and construction of individual and collective stormwater management
systems in Augusta. Furthermore, sound engineering practices and judgement should be applied
in the planning and design of all facilities proposed to comply with the stormwater management
policy for Augusta-Richmond County Commissio~. Constructed facilities designed and based on
criteria in excess of the minimum established requirements as stated in this technical manual may
be necessary in order to effectively control and manage stormwater runoff for newly constructed
facilities. Augusta-Richmond County Commission does not assume to provide complete and
comprehensive technical review of construction plans and reports submitted for the construction
of new facilities but rather provides a general review of information and documentation submitted
through the Public VI orks Engineering Department to generally insure that appropriate
documentation of. design calculations have been submitted in accordance with the' minimum
technical criteria stated herein. To this end, the engineer, developer, and land planner shall be
responsible for the intent of the stormwater management policy based on actual field conditions
and construction techniques.
In the event that exceptions to the minimum requirements should be proposed by the
developer, the engineer and designer shall meet with the County Engineer to discuss proposed
exceptions to minimum requirements.
Technical Draft No.4
August 22, 1997
Page 1
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
PART I HYDROLOGYIHYDRAULICS
Section I
Determination of Storm Runoff
1.01 General:
Determination of stormwater runoff is a complex issue involving existing drainage basin
characteristics, future drainage basin characteristics, the relationship of the proposed development
to the drainage basin and the characteristics of downstream properties and receiving waters. The
most obvious and accurate method of determining runoff for a particular basin area would be to
utilize historical data of measured runoff values. However, except in certain, limited, instances,
this information is not available. Therefore, establishing runoff d~ta for a particular drainage basin
requires the utilization of rainfall - runoff relationships through various hydrology models.
1.02
In order to effectively establish rainfall - runoff relation~hips, basic data concerning the
basin and site must be collected and provided in the hydrologylhydraulics report:
· Delineation of the drainage basin of which the site is a part. The drainage basin
shall be provided at an appropriate scale that can be utilized in the overall
hydrologylhydraulics report evaluation. USGS quadrangle maps of the drainage
basin area shall be used as a minimum standard map.
· A topography map of the site proposed for development shall be provided with 2
foot contour intervals accurate to 1/2 the contour interval. The site topography
map shall be provided with sufficient data to determine site characteristics prior to
development and following construction of proposed improvements. The site
topography map shall be provided at a scale commensurate_with construction
drawings.
· Drainage features, natural or man.-made, designed to receive discharge from
proposed site improvements shall be identified on the drainage basin map and the
site topography map. Sufficient data regarding the drainage features shall be
provided to accu~ately characterize the feature including but not limited to depth,
width, side slopes, surface materials, etc.
Technical Draft No.4
August 22, 1997
Page 2
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
· Soil characteristics of the proposed developed area as well as immediate
downstream receiving areas shall be provided.
1.03
Each project designed in Augusta shall comply with the following criteria and guidelines.
Construction plans and details are required for review by the County Engineer. A hydrology and
hydraulics report of the project and associated basin, as outlined herein, shall be prepared and
submitted to the County Engineer for review.
Numerous rainfall - runoff computation methods are available. It is essential that a
computation methodology consistent with both site and drainage basin characteristics be selected
to design the storm drainage and flood control system. The rational method may be used to
determine the flows for sites located in contributing drainage basins less than 100 acres. For
drainage basin areas 100 acres or greater, Natural Resources Conservation Servic~lTR-20 and
TR-55, or the US Army Corps of Engineers HEC-l method should be used.
Documentation of runoff generated by the selected methodology shall include data for the
2, 5, 25, 50, and 100 year return frequency storms. Runoff data shall be calcul~ted for the
drainage basin and site both prior to development and after development. For contributing
drainage basins 100 acres or greater, the Natural Resources Conservation Service Type IT storm
for a 24 hour period is required as a minimum.
All rainfall - runoff computations require physical site characteristics expressed in
numerical designation. Runoff coefficients utilized for the Rational Method shall be in accordance
with the table provided in the Appendix of this manual. Runoff curve numbers as established in
the Natural Resources Conservation Service manual for hydraulic computations shall be utilized in
SCS computation met~ods.
The HydrologylHydraulic Report of the drainage basin area and site shall include input
data, method of analysis, runoff generation, and routing calculations for on-site arid off-site
subbasin areas.
Technical Draft No.4
August 22, 1997
Page 3
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Section II Storm Drains
2.01 General:
The purpose of this section is to consider the hydraulic aspects of storm drains and their
appurtenances in a storm drainage system. Hydraulically, storm drainage systems consist of
conduits (open or enclosed) in which unsteady and non-uniform flow exists. The design storm
shall be 25-year return frequency storm with evaluation of the overall storm drainage system in
the event of 100-year return frequency storm.
2.02 Guidelines:
General rules in minimum design criteria required for public storm drain systems are as
follows:
a. Minimum acceptable pipe size shall be 18 inch diameter.
b. Do not discharge the contents of a larger pipe into a smaller one even though the
capacity of the ~maller pipe may be greater due to a steeper slope.
c. Provide routing calculations for storm drainage system including off-site flows for
the 25-year return frequency storm. Hydraulic grade lines for systems should not
exceed ground surface elevation at inlets for design storm.
d. Storm drain should be designed to allow velocities of flow sufficient to prevent
deposition of solid materials.
e. For inlet and outlet pipe conditions, headwall shall be constructed in accordance
with GA Department of Transportation Standards. All headwalls shall be GA
Department of Transportation Construction Standard 1125. Safety end-sections
may be utilized for longitudinal pipe located within the right-of-way and F.E.S. for
storm drainage pipe located outside right-of-way.
f. Documented appropriate coefficients of roughness for pipe material shall be used
in Mannings equation.
2.03 Inlets:
'Inlets shall be constructed as part of the storm drainage system to intercept surface water
and convey the water to the storm drainage system. The following guidelines shall be used in
design of inlets located in streets:
Technical Draft No.4
August 22,1997
Page 4
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
a. Inlets shall be located within the proposed street system based on the drainage area
and the overall storm drainage system design.
b. Inlets shall be spaced and sized based on drainage area contributions and by-pass
quantities.
c. All inlets shall be constructed in accordance with the Georgia Department of
Transportation Standards for Construction.
d. Recessed inlets shall not decrease the width of the sidewalk.
e. Design and location of inlets shall take into consideration pedestrian and bicycle
traffic. In particular, grate inlets shall be designed to assure safe passage of
bicycles.
f. The use of slotted drains in public systems shall not be acceptable unless no other
alternatives are available.
g. Storm drainage system plans shall depict the location of all inlets and other storm
drainage system structures including, but not limited to manholes, mains, laterals,
ditches, culverts, etc.
h. F or each inlet, data shall be submitted indicating the drainage area to the inlet, inlet
time of concentration, design raJnfall frequency, and peak flow.
1. Catch basins shall not be located with radii at street intersections. If stormwater
collection is necessary along radius, use Georgia Department of Transportation
1019-A, Type "E". Use multiple grates if volume warrants.
Section ]]1. Open Channels
3.01 General:
Open channels may be designed and constructed as an integral part of the storm drainage
system. The benefits of open channel drainage systems related to cost, capacity, or potential
storage should b~ carefully considered in comparison to disadvantages such as easement and
right-of-way needs and maintenance cost. Open channels may be classified as natural or man-
made. The function and characteristics of these channels may be altered by the addition or
construction of channel linings. Three (3) main classifications of channel linings are recognized:
vegetative, flexible, and rigid.
Technical Draft No.4
August 22, 1997
Page 5
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
3.02 Desi&n Guidelines:
The minizrium requirements for the design of open channels shall be based on the following
criteria:
a. Open channels shall be designed to accommodate the 25-year design frequency
storm as a minimum. Should open channels be located in areas where rainfalls
exceeding the 25-year return frequency storm would cause excessive damage to
surrounding properties, additional capacity may be required.
b. Maximum permissible velocity for grass lined channels is six (6) feet per second for
the design storm. Flow velocities shall not exceed six (6) feet per second at
transition locations where storm water flow exits onto grass lining. Exceptions
may be processed when an approved modeling method such as HEC-15 shows that
the channel is stable under the proposed conditions.
c. Roughness coefficients for the design of open channel drainage systems shall be
based on the Natural Resources Conservation Service manual or by the design
method.
d. The minimum slope for grass lined channels shall be one (1 %) percent.
e. Generally in public systems side slopes for grass lined channels shall be three (3)
horizontal to one (1) vertical or flatter with the exception of roadside ditches
(roadway design standards). Changes in direction of channels shall be
accomplished using simple horizontal curves. The centerline curvature shall have a
minimum radius of twice the top width of the design of flow.
f Concrete lined channels shall be designed to avoid hydraulic jumps. If hydraulic
jumps are unavoidable, sufficient freeboard shall be provided. The channel shall be
constructed of reinforced concrete.
g. Appropriate energy dissipation devices shall be constructed in channels to control
flow velocities.
h. Channel drop structures may be required to reduce channel velocities and reduce
upstream and downstream channel slopes. Design of channel drop structures shall .
be accomplished to contain design flow in channel, maintain allowable velocities
and minimize maintenance cost.
Technical Draft No.4
August 22, 1997
Page 6
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
3.03 Erosion Control:
Appropriate erosion control methods shall be employed to insure functional operation of
the open channel and minimize maintenance cost. The "Manual for Erosion and Sediment Control
for Georgia" shall be used for appropriate erosion control methods.
Non-structural erosion control measures are encouraged where feasible. Other structural
erosion control measures may include rip-rap, gab ions, or other constructed facilities. The
designer shall provide adequate calculations to the County Engineer for review of such facilities to
determine required velocity control and appropriate soil and erosion control measures
Section IV CULVERTS
4.01 General:
The traditional use of culverts is to convey storm flow through or under an existing
structure or facility without causing excessive backwater build-up or overtopping the structure
while minimizing excessive downstream velocities. Culvert sections will include upstream
approaches, headwalls, culvert piping, outlet headwalls, and downstream energy
dissipation/velocity control structures. Unless required by the Augusta-Richmond County Public
Works Engineering Department, culverts shall be designed for a 25-year return frequency storm
with back water elevations not exceeding a height six (6) inches below the shoulder of the
roadway.
4.02 Design Guidelines:
a. Inlet and outlet headwalls shall be Georgia Department of Transportation
Construction Standard 1125. Outlet headwalls shall include the energy dissipation
structures.
b. Additional energy dissipation devices/structures may be required at outlets to
control velocity.
c. Selection of culvert size shall be based on hydraulic calculations for inlet control
and outlet control conditions.
d. For culverts draining greater than four (4) acres of runoff, hydraulic design
calculations shall be submitted.
Technical Draft No.4
August 22, 1997
Page 7
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
e. In outlet control conditions, the determination of tail water depth shall be included
in the design.
f. The drainage basin and peak flow for culvert design shall be provid~d.
g. A minimum velocity of2.5 feet per second is required for culverts flowing partially
full to minimize sedimentation build-up.
Section V DETENTION
5.01 General:
This Stormwater Management Program has been developed to control increased runoff
generated by development of property in the urban, suburban, and rural areas of the county.
General impacts ofland development include: increased rates and volumes of runoff, increased
channel erosion and degradation, increased sedimentation, greater levels of pollution, and lower
base flows during non-storm conditions. Augusta requires the design and construction of
stormwater management facilities such as detention, retention, infiltration, and sedimentation
ponds to address and mitigate the results of urbanization.
In general, stormwater management facilities shall be designed to provide for temporary
storage of stormwater runoff The volume of stormwater runoff collected and stored will then be
released at a controlled rate not to exceed the pre-developed peak runoff rate of the site for the
equivalent storm. Augusta encourages the use of best management practices in the design and
construction of stormwater management facilities, including storage facilities, to minimize the
transportation of pollutants, provide for effective erosion control, and minimize the transport of
sedi~ent.
5.02 Detention Guidelines:
Stormwater runoff storage facilities shall be designed in accordance with the following
minimum criteria~ depending on project location, basin characteristics, and evaluation of project
impacts by the County Engineer, additional requirements or support documentation may be
neces'sary .
Technical Draft No.4
August 22, 1997
Page 8
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
J.
"
a.
Storage facilities shall be located to collect all runofffrom proposed developed
areas; justifiable exceptions to allow portions of a development to bypass
detention may be made by the County Engineer.
Storage facilities shall not be located within the 100-year flood plain in accordance
with the flood plain management policy of the current Augusta-Richmond County
Commission Flood Plain ordinance.
Storage facilities shall be designed to provide adequate volume to detain the runoff
difference between the pre-developed and post-developed site area for the design
storm.
Stormwater runoff data shall include tabular hydro graphs of pre-developed and
post-developed runoffs for the 2, 5,25, 50, and lOO-year storms.
Outlet structures shall be designed to control the release of stored stormwater
runoff not to exceed the pre-development runoff rate for the corresponding storm,
based on the 2, 5, 25, and 50-year return frequency storms.
Detailed construction information including plan and cross-section(s) views shall
be provided o~ the outlet structure, including type of structure, type of release
control, ie weir and orifice control, etc.
Stage-discharge rating data shall be presented in tabular form with all discharge
components, including orifice, weir and outlet conduit flows and velocities clearly
indicated.
b.
c.
d.
e.
f.
g.
h.
The bottom area of the storage facility should be sloped towards the outlet to
prevent standing water conditions, other methods acceptable to the County
Engineer may be used.
Sedimentation control measures shall be installed within the storage facility to
prevent transport of settlement into the outlet structure and downstream receiving
1.
waters.
k.
For each storm event, a hydrograph routing methodology shall be used to indicate
staged-storage-discharge relationships. Routing hydrographs will not be required
for storage facilities designed on sites smaller than five (5) acres.
The design of storage facilities that require storage volumes in excess of 100 acre
feet or earthen embankments in excess of25 feet shall be prepared in .accordance
Technical Draft No.4
August 22, 1997
Page 9
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
r.
t.
I.
with the Georgia Safe Dams Act and submitted to the Georgia Department of
Natural Resources Safe Dams Division for review.
Slopes of earthen embankments shall be constructed with two (2) horizontal to one
(1) vertical dimensions or flatter. Details of embankment construction, including
geometry, materials of construction, compaction characteristics, etc. shall be
provided.
For embankments in excess of 15 feet in height, design and construction data
relating to embankment stability, foundation preparation, and resistance to erosion
shall be provided.
Outlet structures shall be designed to provide release oflow flow volume and
prevent standing water within the detention pond.
An emergency overflow shall be provided for all storage facilities, capable of
passing the 100-year return frequency storm unless the 100-year storm is
accommodated through the principle spillway/outlet.
Grassing schedule for earthen embankment and exposed soils from construction
activities shall be provided.
Trash racks and safety grates will be required for all outlet structures and outlet
pipes greater than or equal to 18 inches.
A six (6) foot chain link fence with three (3) strands of barbed wire and 14 foot
access gate shall be insta!led around public detention ponds. Hold Harmless
Agreements may be executed by the developer for private systems (see Appendix).
Sheet flow over side banks of the detention pond is discouraged; off-site flow shall
be routed to the common locations and conveyed into the stormwater storage
facility utilizing structural practices to minimize erosion.
For facilities to be dedicated to Augusta-Richmond County Commission, O-ring
RCP shall be required for the entire length of pipes penetrating the embankment or
dam; justifiable exceptions may be accepted by the County Engineer.
m.
n.
o.
p.
q.
s.
Technical Draft No.4
August 22, 1997
Page 10
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
5.03 Exemptions:
Exemption to stormwater runoff storage requirements may be made on a case-by-case
basis within the urban areas of Augusta. In order to apply for an exemption to stated stormwater
requirements, the following criteria must be met:
a. The site must be located within the urban district, or
b. Proposed changes to the site or proposed development activities produce no
change in runoff, or
c. The site is less than one (1) acre in size and the proposed development does not
produce stormwater runoff greater than 1 cfs in excess of pre-developed
conditions on a 50-year return frequency storm.
Section VI OUTFALL-RUNOFF RELEASE
6.01 General:
The outfall of stormwater runoff storage facilities directly impacts down stream properties
and receiving waters. The location of the outfall structure is therefore crucial in the design of an
overall stormwater management system. In general, the outfall from a storage facility should be
located to access the nearest natural drainage feature or stormwater conveyance system with
adequate capacity to convey released flow from the storage facility. Overflow or emergency
spillways designed to accommodate a 100 year return frequency storm mayor may not be located
near the principal outlet structure depending on capacities and the impact of down stream
properties.
6.02 Design Guidelines:
The following information shall be provided for evaluation of the stormwater release
locations:
a. Indicate and label the drainage feature located immediately downstream of the
outlet structure.
b. Indicate the nearest receiving creek, stream or tributary as delineated by FEMA or
USGS quadrangle maps and distance to such feature.
c. Indicate outlet location and discharge flows on plans.
Technical Draft No.4
August 22, 1997
Page 11
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
d. Provide energy dissipation structures to control outlet velocities for erosion
control, if necessary.
Section VII SPECIAL BASIN RESTRICTIONS
7.01 General:
Urban development has significantly impacted certain creek drainage basins resulting in
serious damage to property and the disruption of infrastructures services to commercial and
residential areas within the basin during significant rainfall events. Consequently, these basins
have been identified as requiring special consideration in design of residential and commercial
developments. The drainage basins identified as requiring additional design consideration are as
follows :
a. Rae's Creek Basin
b. Rocky Creek Basin
c. Rock Creek Basin
Within these basins, the following restrictions, shall apply:
· F or site developments less than ten acres, no fill or detention facilities shall be
placed in the flood plain based on a 100 year return frequency storm as established
by FEMA
· Stormwater management facilities are required for all developments
· The release of stormwater runoff from storage facilities shall be limited to 90% of
the pre-developed rates
Technical Draft No.4
August 22, 1997
Page 12
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
PART IT ENVIRONMENTAL REQUIREMENTS
General:
All storrhwater management plans are required to comply with local, state and federal
regulations including environmentally sensitive land areas, "wetlands", stormwater run-off quality,
and specific National Pollution Discharge Elimination System, "NPDES" programs. Depending
on location and impact on downstream waters from proposed developments, other state and
federal regulations may require compliance.
Section I
1.01
Wetlands
The delineation and jurisdictional approval of wetlands as identified under Section 404 of
the Clean Water Act is regulated by the US Army Corps of Engineers. For projects located in
Augusta, the Savannah office of US Army Corp of Engineers provides review and enforcement
. activities. Although compliance of section 404 of the Clean Water Act is the responsibility of the
property owner, Augusta-Richmond County Commission is dedicated to insuring the protection
of natural resources and working with the Corps of Engineers in identifying, accessing and
evaluating the impact of proposed developments on a existing wetland areas. Should
characteristics typical of wetland be identified within a specific project area, the County Engineer
may request additional information concerning the impact of the proposed development on this
area and/or the jurisdictional on delineation of the area.
For projects impacting wetland areas, appropriate documentation of design approval by
the US Army Corps of Engineers will be required; for projects impacting lands within 25 feet of
state waters shall require appropriate variances for Georgia Department of Natural Resources.
Section II Water Quality Requirements:
2.01
The water quality of stormwater runoff depends on a number offactors including:
magnitude and duration of rainfall events, soil types, time between storms, land use type and
specific activity, illicit connections or illegal dumping, and the ratio of the runoff per volume to
Technical Draft No.4
August 22, 1997
Page 13
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
the receiving water flow volumes. The storm water management policy adopted by Augusta-
Richmond County Commission recognizes that the use of structural and non-structural controls
for stormwater management programs are beneficial in the controlling pollution of the receiving
waters. Therefore, best management practices (EMP'S) are encouraged in stormwater plans in
project design and construction. BMP's may include a maintenance and activities schedule for
drainage facilities, soil erosion and sedimentation control practices, etc. All developments must
comply with the Soil Erosion and Sedimentation Control Ordinance, current edition, as minimum
structural and non-structural standards for project design.
Section III Local Regulations:
3.01
In response to specific requirements in the Clean Water Act of 1993, Augusta has been
given authority by the Georgia Department of Natural Resources, Environmental Protection
Division to permit the National Pollution Discharge Elimination System permit program. The
local program requires the use of best management practices based on the current Soil Erosion
and Sedimentation Control Ordinance adopted by Augusta-Richmond County Commission. The
application of these regulations includes the use in stabilization, mulching, straw, grass, silt fences,
sediment traps, and other temporary/permanent structures for minimizing soil erosion and the
transportation of sediment into receiving waters. All developers shall comply with these
regulations.
Technical Draft No.4
August 22. 1997
Page 14
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
.1
I
PART ill
MATERIALS FOR CONSTRUCTION
SECTION I STORM DRAINS:
3.1 General:
For public systems, all storm drain pipe, manholes, junction boxes, catch basins, inlets, etc.
and appurtenances shall comply with GA Department of Transportation construction standards
and specifications. Additionally, bedding material, when required, and select backfill shall comply
with these regulations. The following specific design criteria will be required for new
developments:
3.2 Desi2n Guidelines:
a. All storm drain pipe located under pavement or longitudinal pipe as part of the
roadway drainage system shall be reinforced concrete pipe. A minimum class ill
reinforce concrete pipe shall be used. All concrete pipe shall be manufactured and
installed in compliance with GA Department of Transportation standards and
specifications. Concrete arch pipe shall only be allowed with special approval by
the City Engineer.
b. Outside of right-of-way limits, other suitable pipe materials may be used.
Installation shall be in accordance with GA Department of Transportation
construction specifications.
c. Catch basins, drop inlets, junction boxes, grate inlets, hoodback traps, storm
manholes, etc. shall be constructed in accordance with GA Department of
Transportation construction specifications and standards.
d. Catch basins installed along roadways with raised edge asphalt sections, shall
include concrete transition lengths standards for construction. The construction of
the transition curb shall be of concrete as per construction standards and tie into
the raised edge asphalt. The face of the proposed catch basin shall be located at
, the back of the raised asphalt section "not at the gutter line".
Augusta recognizes that private developments may be designed and constructed in the
County. Private developments not constructed in accordance with GA Department of
Transportation Construction standards, as noted herein, can not be accepted into the county
Technical Draft No.4
August 22, 1997
Page 15
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
system for improvement and/or maintenance unless improved to minimum county standards and
accepted by the county..
Section II CUL VERTS:
2.01
Culverts shall be constructed of Class III reinforced concrete pipe, Class IV reinforced
concrete pipe, as appropriate, or concrete box culverts. Design of said facilities shall be in
accordance with GA Department of Transportation standards specifications and construction
standards.
Section III Soil and Rock Structures:
3.01 General:
Soil and rock structures shall include earthen embankments for roadways, earth and/or
earthrock structures for dam construction, dikes, containment embankments, and structural earth
berms for the support offacilities or structures, impoundment of water, or diversion of runoff
Earth and earthrock structures do not include landscaping berms. For earthen dam construction,
sufficient design information regarding the con~truction of the proposed impoundment
embankment shall be provided. This data shall include the suitability of the materials and design
cross-sections to ensure geometric stability of the structure. Soil for embankments impounding
water shall have at least 15% clay content and be compacted to a minimal of95% of standard
proctor dry density at or near optimum moisture content. For earthen structures, design data shall
include sufficient information to indicate the stability of the soil structure and provisions to
prevent piping, excess seepage, etc. Earthen structures that must comply with the GA Safe Dams
Act shall be submitted to the Department of Natural Resources Dam Safety Division for review.
Earthen structures will also include the construction of s~ales. The type of erosion
control practices required for construction of swales will depend on the velocity of runoff for the
design storm. Construction of swales shall be accomplished in accordance with the Manual for
Erosion and Sediment Control in Georgia.
TechiUcal Draft No.4
Au~t 22, 1997
Page 16
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
J
Section IV GRASSING
4.01
Temporary and permanent grassing are required to comply with the Soil Erosion and
Sedimentation Control Ordinance adopted by Augusta-Richmond County Commission. Grassing
schedules shall be submitted in accordance with the Manual for Erosion and Sediment Control.
Section V Fencing
5.01
Fencing is required around all impoundments designed as permanent stormwater runoff
storage facilities to be dedicated to Augusta-Richmond County Commission. In some cases, a
hold hannless agreement may be executed by the owner of the project to eliminate the installation
offencing for the subject stormwater storage facility (see Appendix). Where fencing is required,
all fencing shall be 11 gage (minimal) and 6 feet in height. The fencing shall contain three (3)
strands of barbed wire or ribbon wire to inhibit unauthorized access and shall include access
gates, minimum 14 feet total width. All fencing shall include a top rail in accordance with GA
Department of Transportation Standards.
Technical Draft No.4
August 22, 1997
Page 17
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
PARTlY
SOIL EROSION & SEDIMENT CONTROL
Section I
1.01 General
Soil erosion and sedimentation control is critical in the continued effort to minimize
damage to Georgia's land and water resources. In response to the need for control of these
natural forces, enhanced by both natural features and man-made developments, the Georgia
General Assembly enacted the "Erosion and Sedimentation Act of 1975". The purpose of this act
is to "...strengthen and extend. the present erosion and sediment control program to conserve and
protect land, water, air, and other resources of the state". Land disturbing activities that result in
soil erosion by natural forces or forces produced by man, include but are not limited to:
. Clearing
. Dredging
. Grading
. Excavating
. Transporting
. Filling
Exclusions to the 1975 Act, as amended, include:
· Surface mining
· Granite quarrying
· Minor land disturbing activities
· a. Construction of single-family residence under contract to the owner
b. Construction of single-family residence not part of a larger project
Agricultural and forestry practices
Any project under technical supervision of the Natural Resources Conservation
Service
Projects involving 1.1 acres ofland or less (if not within 200 feet of state waters)
Construction or maintenance by the Department ofTransportatiori, Georgia
Highway Authority, Georgia Toll-way Authority; road construction or
maintenance project undertaken by counties or municipalities; construction or
.
.
.
.
Technical Draft No.4
August 22, 1997
Page 18
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
maintenance by water and sewer authorities established by the General Assembly;
provided th~ activity meets state minimum requirements
· Projects conducted by the Airport Authority, provided the activity meets state
minimum requirements
· Projects undertaken by EMC's or municipal electric systems, or any public utility
under the Public Service Commission, provided the activity meets state minimum
requirements.
The technical requirements to insure conformance with the 1975 Act, as amended, are provided in
the Manual for Erosion and Sediment Control in Georgia. The latest edition of this document
shall be referenced.
Section II Soil Erosion and Sedimentation Control Plan
2.02
Soil erosion and sedimentation control practices and structures shall be indicated on a plan
submitted for review in accordance with the Augusta-Richmond County Soil and Erosion Control
Ordinance. In accordance with state law, these plans shall be submitted to the local Soil and
Water Conservation District office for plan review. Enforcement of these measures will be
accomplished by the Augusta-Richmond County Public Works Engineering Department.
Erosion and sediment control plans shall be prepared in accordance with the
Manual for Sediment and Erosion Control in Georgia, latest edition. A copy of the plan review
checklist is included in the Appendix.
Technical Draft No.4
August 22, 1997
Page 19
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
PARTV MAINTENANCE
1.01 General:
The effectiveness of a stormwater management program is dependent on the long-term
ability of structural and non-structural facilities and practices designed and constructed to address
program requirements to function in a changing environment. Maintenance of these facilities is a
critical issue to the success of the program. Therefore, maintenance is an important consideration
and must receive consideration during the design process. Planners. designers and engineers are
encouraged to design stormwater management facilities to minimize long-term maintenance costs.
If special considerations for long-term maintenance are required for the efficient operation of a
stormwater management facility, this information should be provided to the Augusta-Richmond
County Public Works Engineering Department.
In general, maintenance requirements may vary for various types of constructed
improvements. Therefore, temporary maintenance agreements are required for those properties
dedicated to Augusta-Richmond County Commission for maintenance and ownership while
private and conunercial developments are responsible, independently, for the maintenance and
efficient operation of facilities developed for these projects.
Section I
2.02
Commercial Development
Owners of conunercial developments are required to provide routine and remedial
maintenance activities to maintain the design level of operating condition of the system. Capital
improvements may be required in the event of system failure resulting from structural
deterioration or the inability of the constructed facility to meet approved d_esigned criteria.
Periodic maintenance inspection shall be performed by Augusta personnel to insure the
operation of constructed facilities. Property owners will be advised of these inspections and
necessary maintenance activities that may be required to insure that constructed facilities operate
effectively.
Technical Draft No.4
August 22, 1997
Page 20
I
I
I
.1
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Section 11 Residential Subdivision with Public Rights-ol-Way
2.02
Residential subdivisions constructed in accordance with standards and specifications
established by Augusta-Richmond County and submitted for dedication to the county system
shall be inspected during construction.by Augusta-Richmond County Public Works Engineering
Department. 1I:ttr~!f~im!I~!{Ii~!llr~D1frl;[~~;l_:I~fir_;lillmm;t~
']IU~iliD_4r&~fililiQ_jiqhili~d~ilr~aa1'I'Jlf2.jl~1j~ri(~JjDII.~lrI~1
l~m!{<<rgl~Efi[~I_~~liwl~II,iI11~yl\f1~lq~il)fftl;[I__p.lImJ.p._j]1 During the
developer maintenance period, the developer and/or contractor shall be responsible for all routine,
remedial and/or capital improvements required to assure the storm drainage facilities effectively
operates within the parameters established during design.
Following the developer maintenance period, and after public right-of-ways,
easements, etc. are dedicated to and accepted by Augusta-Richmond County Commission, routine
maintenance, and capital improvement activities shall become the responsibility of the County.
Section 111 Private Subdivisions
3.01
Private subdivisions may be designed and developed in accordance with sound engineering
practices and specifications that have not been adopted by Augusta-Richmond County
Commission for acceptance into the county infrastructure system. Therefore, it is the
responsibility ofthe property owner(s) to maintain storm drainage facilities in accordance with
design requirements. This responsibility shall include the necessary periodic and regular .
maintenance as required to insure the efficient operation of the system. Capital improvements
may be required in the event of system deterioration or ineffective operation of the facility based
on approved plans.
Final plats of privately developed subdivisions shall include the following statement
identifYing the property owner(s) responsibility for maintenance of the stormwater system in
perpetuity:
Technical Draft No.4
August 22, 1997
Page 21
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
"The streets, roads and stormwater management facilities are the private
property of the owner, who has full and perpetual responsibility for their
maintenance and repair. The owner releases Augusta-Richmorld County
Commission from any and all claims, damages, or demands arising on
account of design, construction, ownership and maintenance of the streets
and roads as shown hereon. The Augusta-Richmond County Commission
assume no liability or duty related thereto, and in no marmer approves or
assumes liability for the design of the streets and road as shown hereon. "
Private subdivisions not constructed in accordance with the standards and
specifications setforth by Augusta-Richmond County Commission may not be inspected during
construction activities. Consequently, these developments and associated infrastructure can not
be accepted mto Augusta infrastructure system for owner and maintenance.
Technical Draft No.4
August 22, 1997
Page 22
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
REFERENCES:
Augusta-Richmond County Subdivision Regulations, mJ"~
Columbia County Subdivision Regulation Manual, April 1993
Drainage Criteria Manual, City of Austin, Texas, Revised 1989
Drainage Procedures Manual DeKalb County, Revised 1978
Environmental Criteria Manual, City of Austin, Texas, Revised 1991
Highway Drainage Guidelines, AASHTO 1987
Manual for Erosion and Sediment Control in Georgia, Fourth Edition, 1996
Manual on Drainage Design for Highways, Georgia Department of Transportation, revised 1988
Manual on Drainage Design Fulton County Department of Planning & Community Development,
1983'
Municipal Stonnwater Management by Debo and Reese, 1995
Regulation of Stormwater Management Systems, Saint Johns River Water Management District,
Palatka, Florida, revised April 1994
Urban Stormwater Management Special Report No. 49, American Public Works Association
Technical Draft No.4
August 22, 1997
Page 23
I
I
I
I
I.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
APPENDIX
Technical Draft No.4
August 22, 1997
-
-
-
-
-
-
-
-
-
-
..
-
-
-
-
-
-
-
-
PROJECT: CALCULA TION T ABLE FOR CULVERT. DESIGN
- _6.,. ...__ -
I
TOTAL LOSSES
EL. -- . - - T
~T ~ H=he + hf + hv
U
HW -- --...:!1...-
_L -
EL. ~
- - honw) m Hw ::: H + ho - LSo
-
EL. - - D : ho :do2+D or Tw
- - - (2) For Tw <
(Whlohever 16 greater)
TYPE= So= n= For Tw>D : ho=Tw 2
INLET= L= a FULL= (3) For Box Culvert I do =0.315 (~j .so
Ke= SoL= V FULL=
- - -
INLET CONTROL OUTLET CONTROL EaUA TIONS CON- CAL-
- - - -
ELEV. - - Tw < 0 Tw>O TROLLED CULATED
HW HW a H Tw - - HW
n dq ho= d~2tO ho HW ELEV.
- - - - - - - -
I 2 3 4 5 6 1 8 9 10 I 12 13
_._- - - - - -
-----. -- - - -
- _l -
- -I - -
-- -, -
. -
.,
Q-4
~~
:lID
'1.
....P1
,..,
..."
))f\)
I
I
I
I
I
I
I
I
.1
I
I
I
I
I
I
I
I
I
I
180
\68
156
144
'~2
120
108
96
84
72
(/)
LIJ
~
e,;)
z 60
z
8 54 (/)
u.
l- e,;)
a: z
LIJ 48
.~ a
:::>
e,;) LIJ
u. 42 <.:)
0 a:
~
a: ~
LIJ e,;)
I- ~6 (/)
LIJ 0
~
~ 33
0 -
- -
30
27
24
21
18
15
12
BUREAU OF PUBLIC ROAOS
MARet 1964
Jl. ! ! ! ENTRANCE
0 TYPE
0.042 0.063 0.042 0.083 A
0.083 0. 125 0.042 0.125 B
A B.
~ooo BEVELLED RING ~3.0
MINIMUM 300.
3.6
2000
3.0
-
DIAMETER'D 0
1000 1 ..... 2.0
~
800 ~
2.0 (/)
600 a:
500 LIJ
I-
400 LIJ 1.5
::::E
1.5 ~
300 0
l&l Z
z
200 :; ~
<:I I-
z a..
z LIJ
a:: 0
::I
~ a:
100 LIJ
80 I-
~ 1.0
1.0 ~
60 0
~
50 LIJ
~ .9
40 ~--
- -
E.~!l:-E. - - -
- -
-- - .8
0 .8
10
8
.7
.7
6
5
4
.6
.6
3
2
.52
.52
1.0 .
HEADWATER DEPTH-FOR
CIRCULAR PIPE CULVERTS
WITH BEVELED RING
I N LET CONTROL
CHART 7 - 23
I
I
I
97&151
87 a 136
77&12\
72 & "3
68&106
63& 98
58&91
(I)
1&.1 53&83
:z::
(.;)
z
48&76
Z ...........
1&.1 ,../'" (I)
a.. 43 . 68 ./' l&..
a.. ./' (.;)
./' z
..J ./'
. ,../'" ~
>
0 38&60
l&.. 1&.1
0 Cl
a:
34 . 53 .
1&.1 :z::
en (.;)
a: en
32&49 0
..
Z
. 29&45
a..
en
1&.1 27&42
~
en
24138
I
I
I
I
I
I
I
I
I
I-
19&30
I
I
14&23
I
I
BUIIEAU OF PUBLIC IlOAOS JAN. 19113
I
I
5000
4000 EXAMPLE (2)
(3)
3000 Si..: 38.. 60. 6
Q . 200 .... (I) 6
5
2000 y.* HW 5
(lu'l 6 4
5 4
(1) 2.1 13.0
121 2.0 10.0 3
1000 (3) 2.1 10.5 4 3_
800 *' 0 in lu'
3
600 ../ 2-- 2
500 ./' -
./' 0
400 ./' ~ 2
~....9~ :z:: 1.5 1.5
30<l ~
,../'"
,../'" 1&.1
./" !!! US
200 a:
To u" ..01. (2) 0' (3) l&..
d,ow 0 ",oiO'" IIn. 0
.hrouoh IInown vah... en
of .i.. ond dl..llo,O' 2 1.0 1.0
100 '0. in,....., ..01. (I). a:
F,o.. poin' on ..01. (I) "" 1.0
80 t-
p,oj.., 1I0,ilonloll, 10 Z .9 .9
60 lo'ution on ,ith., .cole .9
50 (2)0'(3). :z:: .8
t- .8
40 a..
""
0
30 .7 .7
HW/O ENTRANCE a: .7
""
SCALE TYPE t-
20 <
- ~ .6 .6-
(I) SQuor. .dQI with 0
1I.0dwoll <
""
(2) Groov. .nd wil" :z::
10 hladwall
8 (3) Or009' ."d .5 .5 .5
projectino
6
5
4
I-- 8---i .4 .4 .4
3 CD
2
1.0
HEADWATER DEPTH FOR
OVAL CON CRETE PIPE' CULVERTS
LONG AXIS VERTJCAL
WITH INLET CONTROL
CHART 7 - 21
I .
I I~I 191
3000 EXAMPLE
Size: 7r.4&"
I o. 300 cn (2)
136181 2000 (3)
lm,* HW
0 (f"'1 ( I ) 4.0
I 121111 (II 2.& 11.2
(2) 2.2 &.& 4.0 3.0
113 x12 1000 (3) 2.3 9.2 3.0
800 * 0 in fee,
106168
I 600 -
....-
98163 500 -- 2.0
~",I'\.lJ...- --
400 ~.,.~ 2.0
91158
I ....- 1.5
en 00 - 1.5
au 83x53 Q
X -- )-
0 -- 1.5
Z ....- :z:
--
I z 6148 au
To ... 1C010 (2) or (3) en
au _ a Itroivhl IIn. a:
~ en
68143 LI. 100 ,_,It knOWft yalulI LI.
~ 0
I of lizo end dio."a". 0 1.0 1.0
~ Z 80 10 inlO,oo., 1.010 (II.
e en 1.0
.> .... F.- paittl on I.olo (I) 2:
0 60138 0 project "....i.onlall' 10 a:
- 60 .9 .9
II. au .Glutton on lither leale au .9
0 C) 50 (21 or (3). ~
I a: z
au 53 ll34 c( 40 .8 .8
en :z: :z: .8
0
a:: en 30 ....
. 491132 ~
0 au
I Z 0 .1 .1
e 20 .1 -.
~ 45ll 29 a: ~
en au
HW/o. ENTRANCE ~ .-.
au
N 42121 SCALE TYPE ~ .6 .6
I en 0 .6
10 (II Square 'dV' wit" c(
au
381124 8 "oadwall :z:
(21 Groov. end with
I 6 "oadwall .5 .5
5 (31 GrOVI ,nd .5
4 projo.,inv
I 301119 3
.4 .4
2 .4
I 81
8 0
_1
1.0
I 23114
HEADWATER DEPTH FOR
OVAL CONCRETE PIPE CULVERTS
I LONG AXIS HORIZONTAL
WITH INLET CONTROL
9UFlEAU OF PUIlI..IC /lOADS JAN. 1963
I
I
I CHART 7 - 20
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
5
-
~ ......-
- ....- ~
~ t::: ,.....,.. "
, ~
~ ~ ,.....,.. -
-'
~ ~ ""'"
~ ~ / .
'J'7 ~ v
h ~
. ~ ~ ....., 43.11~ de CANNOT EXCEED TOP OF PIPE
It 30.....
~29"1l45.
24-' 38"
14"1l23.
20
40
60
80 100 120
DISCHARGE-Q-CFS
140
160
180
200
4
3
2
I- 0
~ 0
u..
I
u
~
,
:l:
l-
ll.
~
o
..J
~
(,)
i=
it: \0
(,)
8
-
-- - .--
- .-- I--
-- ....-
- -- ---
~.- -- ,.......... ~
~ ;.-' -- -'
~ ;;...-"....... "
~ ~ V-: ,.......... -
~ ~
~~ y V-
~.!~~. 9Tll 151.
de CANNOT EXCEED TOP OF PI PE
68 1106.
-" 3.19'.
48.1176"
,c. 38.1160"
I
100
200
300
400 500 600
.' DISCHARGE- Q- CFS
700
800
900
1000
6
4
2
00
BUREAU OF PUBLIC ROADS
JAN. /964
CRITICAL DEPTH
OVAL CONCRETE PIPE
LONG AXIS VERTICAL
CHART 7 - 11
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
3.4
1.0
",.,.. --
L...,..ooo "".....
~ :::::"""
.-
-' ~ ;'"
A "" /
~ /' '"
~ ~ V
~ 7 V-
A ~ ,/'
~ ~ ~ de CANNOT EXCEED TOP OF PIPE
~ ~I'.
~ d'-68"1l43"
J 1#. I
."'4"
e...'....
8"1l29!
I
"1lI4"
3.0
2.0
I-
ILl
ILl
lL.
I
...
-,:,
I
%: 0
~ 0
ILl
C
...J
~
:! 7
~
a:
o
20
40
60
80 100 120
DISCHARGE- Q-CFS
140
160
180 200
5
- ~
~ ::;:::..--
~ ".- ~
.- ~
~ ~ ~ ......"
.-
~ r V ~
~ ./
~ " /
~ ~ /
~ lj v
~ '....
.,,-/ "/ , de CANNOT EXCEED TOP OF PIPE
h Vh
.............
~ ~v
'f'//
~ 151\97
- 121"1171
I. 106"1l~8"
~ '':Il~1l5~ I
76"1I14B" 60'.. 38"
g
6
4
:3
2
I
o
100
200
300
400 500 600
DISCHARGE-Q - CFS
700
800
900 1000
BUREAU OF PUBLIC ROADS
JAN. 1964
CRITICAL DEPTH
OVAL CONCRETE 'PI PE
LONG AX as HORJZ ONTAL
CHART 7 - 10
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
3
........"!: ~ ~17"
~~ ~ ;'-:=;3.5'
- de CANNOT EXCEED TOP OF PIPE
..- - ....
1~.O'OIA. . . .. ...
I .
20
30
40 ~O . 60
DISCHARGE- Q - CFS
70
80
90
100
2
o
o .. .10
6
8
~~
~~/
+-- /~~
~~y
~~Vg'"
~V;: 8'
/ I'~ 7'
1~-6'
;. I/~'
o 2 - ~"OIA.
~ 0
a::
o
--~
5
k::::::::==""""'"
/?~
.A~:::::g. ....
t::/" 7 '
7
~
w
w
u..
'u 4
"0
I
~
w
6~
I
U
"0
,
::t:
~
0- '-.
w 3
o
100 .
200
300
400 500 600
DISCHARGE -Q -CFS
700
600
900
::t:
5~
0-
W
o
-J
~
1000 ~
~
a::
o
de CANNOT EXCEED TOP OF PIPE
14
8
---
-- l..----'
~
~ ~
., - ~
~ ~ ...-
.. '0 . ..... -
~ / v
... ./ ;
~ t::/ V
. - .
./
.~ ~ V .,
- .. ... .
~ ~ - . . de' CANNOT EXCEED TOP OF PIPE.
:.-0 2:;3'
-j:. ~'I'
g' OIA.
1000
2000
DISCHARGE- Q - CFS
3000
4000
12
10
., 6
4
o
BUREAU OF PUBLIC ROADS
JAN. 1964
CRITICAL DE PTH
CIRCULAR PIPE
CHAR T 7 - 9
I
I
I
'1
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
.
~
u.. 3
z
-
Co) 2
"C
16
15
14
13
12
...= II
&&..
~ 10
Co)
'1:J 9
8
7
6
5
5
-----
---- "",.-
--- ""..-
~
.. -' "...-
~ ".
CRITICAL DEPTH -
./ I I
./' RECTA~ GULAR SE CTION
./' . .
4
o
o
.10
20
30
a/s
50
60
40
'"
~ ,
1/
~ ,
~
'"
I'
~'
",
. ,
~
l.I
~ CRITICAL DEPTH-
, r-
I . , I .
/ RECT ~NGULAR 'SECTION
/ I I I
, hJ
,
~
~ 8 IN FT.
~ Q IN C.F.S.
~ to J I I ~ 2
~ - dc=.315 (0;8)
. . . '.'
I
"\
,
../'
4
5C 100 150 200
-NOTE: de CANNOT EXCEED' 0 CIS
2S0
300
3S0
BUREAU OF PUBLIC ROADS JAIl. 1963
CHART 7..8
I
I
I
I
I
I
I
I
I
I
I
I
.1
I
I
I
I
2000
~...
:.:
"'-
:1-'
...
1000
800
1!51197
600
136187
500
121177
400 113172
106168
300 98163
91158
200 en 831!53
ILl
::I: 76 I 48
u
:!:
en
....
U
Z
z
o -....!l.~ :
100 ---~
II:
ILl
<::I
II:
c(
::I:
U
en
Q
60 ..
z
c(
60 0..
!!
50 ILl
N
u;
40
30
20
68143
60136
--
53134
C,11j...-
~91 32
45129
42 127
38124
30119
23114
BUREAU OF PUBl.lC ROAOS .IAN. 1963
I
I
10
6
6
5
--
--~~
-- __ .,00
--
---..
-~O
-- 7
6
9
10
~i-U'7 u_ W. u_._
HW ~ Ifto =,
~"-r';"iJl,' . SlOp. 50- ~
SUBM[RGED OUTl.n C\A.Y[RT ~I"G FUl.l.
HW' H. lIo-l.So
Fo, outl.. 0.0_ ...., ...O...."'.d. _pule HW 0,
_'lIod' dnc,illed ift rile d.,i.. pnoc.cl_
.f
. .
Q~ '.,0
.f
. .0
.~
(.
~+.
6';-
oS-
00 1(,,1.
't: ~
~
00 ~.....
"!i '-,;,.
--
--
.,0
o
,0__
~~
__ _, .0.
--
00
.,
NOTE
Dimension. on .ir. .eol. or.
ord.,.crd for lon9 aaia horizon'al
in, foliation. Th., should be
rrHf'.d tor loft9 aai. ..,tical.
HEAD FOR
OVAL CONCRETE PIPE CULVERTS
LONG AXIS HORIZONTAL OR VERTICAL
FLOWING FULL
n = 0.012
CHART 7 - 5
0.4
0.5
0.6
0.7
0.8
0.9
1.0
~
ILl
ILl
....
Z
2
-
::I:
3
Q
c(
ILl
::I:
4
5
6
20
I
I
I
2000
I
I
I
I
I
I
I
I
I
I
I
C)
z ...
1000 z Z
II: ...J
;,
.. I-
800 120
600 108
500 96
400 84
300
72
66
200 60
en
lL 54
<.)
z en 0.48
W 48-
--- :x: ....-
0 <.) ,,-/~
100 z
w ,0 ,,-/- 42
C) ~ z
a: 80
< /~~ Q
:x: 36
<.) 60
en a: 33
w
0 50 ~
w 30
40 :::E
<
0 27
30
24
20 21
18
10 15
B
6 12
5
4
I
I
I
I
I
BUREAU OF PU8LIC ROADS JAN. 1963
~,~1 / -- ~w
s~._ -L-. "
SUBMERGED OUTLET CULVERT FLOWING FULL
HWo =H + hO + EI. Outlet Invert
~A
~.~.
....-~~
~
.../"
~.
.../"~
~I'\..~ .,0
~~
~
.../"
,.../"
<~
"'"
~
'<
./
~
.-f\
(<'(<'
,..
.,0
L.1I0
- --; -;Q.5 -00
e ~
~oo
~oo
~
~ ...
... 0
o .~
.~
HEAD FOR
CO'NCRETE PIPE CULVERTS
FLOWING FULL
n = 0.0 12
CHART 7 - 2
.4
.S
.6
.8
1.0
~
w
W
lL
Z
2
.....
:x:
3
o
<
w
:x:
4
5
-.
6
../
8
10
20
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
5000
4000
100 ....
UJ
80 ~
UJ
60 a:
<t
50 ::)
... 0
....~
-40-z:,-::r
30 x
0
CD
a:
20 <t
...J
::)
e,:)
Z
<t
.....
t.)
UJ
10 a:
u..
8 0
<t
UJ
6 a:
<t
5
4
BUREAU OF PUBI.IC ROADS JAN. 1963
3000
2000
12XI2
1000
800 10XI0
600 9~'9
.....
UJ 8X8
500 UJ
u..
4J:)0 z 7X7
--
---
x
en 300 0 6X6
u.. CD
t.)
UJ
z a: 5X5
200 <t
0 ::)
0
(J)
UJ u..
e,:) 4X4
a: 0
<t Z
~ 100 o 3.5X3.5
t.)
(J) (J)
0 80 z
UJ 3X3
::!:
60 0
50 2.5X2.5
40
2X2
30
20
10
8
6
5
l~ -q. _
Slope So- ~..v//'"
OUTI.ET CUI.VERT FLOWING FUI.I.
- !
~~^l
SUBMERGED
HWo = H + hO + EI. Outlet Invert
<.~
"'G'
)-oY
1'<. )
...",
~
~ <'" ....
-0--.)0. ~
o -----
":)
-r
~.
Q = 400 .f~. q~ ~
::::--_ L q~
...... -_ ,,-- v
., ...._ ---..t..o
/"'".... . ;.-
/I!J.............
0"," L ........ ~o
'" ... 00
Ie 1.00, ..............
e '" 0 00...
.5 tV
00
":l .
00
0.
.,00
....
~
...J
"
Z
Z
a::
;,
....
HEA 0 FOR
CONCRETE BOX CULVERTS
FLOWING FULL
n = 0.012
CHART 7 - 1
.4
.5
.6
.8
1.0
.....
UJ
au
u..
z
2
H. = 2.4'
3
4
5
6
8
10
20
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
EROSION AND SEDIMENT CONTROL PLAN REVIEW CHECKLIST
Project Name
Project Review Number
Date
Name of Plan Reviewer
Site Plan:
1) Graphic scale and north arrow. .
2) Vicinity map - small map showing site relative to surrounding area. including designation of specific phase; if
necessary .
3) Existing and planned contours shall be shown with contour lines drawn with an interval in accordance with the
following:
/
Map Scale Ground Slope Contour Interval. ft.
1 inch :;:: 100 ft. or larger Flat 0-2% 0.5 or 1
scale Rolling 2-8% 1 or 2
Steep 8% + 2. 5 or 10
4) Adjacent areas - neighboring areas such as streams, lakes, residential areas, etc. which might be affected,
should be shown on plan.
5) Location of erosion and sediment practices, using uniform coding symbols from the Manual for Erosion and
Sediment Control in Georgia. Chapter 6, with legend.
6) Delineate all state waters located on or within 200 feet of the project site.
7) Delineate contributing drainage areas both on and off site.
8) The. 25-foot undisturbed buffers of state waters and 100-foot management zones along designated trout
streams must be delineated. Where 'encroachment into buffers or management zones is proposecj, provide
documentation that appropriate variances have been obtained.
9) Include soil series and their delineation.
Narrative, or notes, and other information: (Notes or narrative should be located on the site plan under general
.notes or under erosion and sediment control notes.)
1) Statement from local tax official that ad valorem taxes owed and dues have been paid.
2) Description of existing land use at project site and description of proposed project. Include land lot and
district for site location.
3) Name. address, and phone number of developer/owner.
4) Name and phone number of 24-hour local contact who is responsible for erosion and sediment controls.
5) Signature/Seal of qualified plan preparer.
6) Size of project or phase under construction, in acres.
7) Activity schedule - show anticipated starting and completion dates for project 'events, including vegetation/
mulching. Include the statement in bold letters that "The escape of sediment from the site shall be prevented
by the installation of erosion control measures and practices prior to, or concurrent with, land-disturbing
activities. ..
8) Include specific design information and calculations for all structural measures 'on site. such as temporary
sediment basins, retrofitted detention ponds, and swales.
9) Show storm drain pipe and weir velocities and demonstrate how receiving area will accommodate discharges
without erosion.
10) Vegetative plan - for all temporary and permanent vegetative practices. Include species. planting dates. and
seeding, fertilizer. lime, and mulching rates. Vegetative plan shall be site specific for appropriate time of year
that seeding will take place an'd for the appropriate geographic region of Georgia.
11) Detailed drawings - for all structural practices. Specifications must, at a minimum, meet guidelines set forth in
the Manual for Erosion and Sediment Control in Georgia.
12) Maintenance statement - "Erosion control measures will be maintained at all times. If full implementation of the '
. approved plan does not provide for effective erosion control, additiona~ erosion and sediment control measures
shall be implemented to control or treat the sediment source."
GaSWCC (Amended. 1995)
. ..6-9
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
\
ORDINANCE NO. 95-8
AN ORDINANCE TO AMEND THE ORDINANCE.
ESTABLISHING SOIL EROSION AND SEDIMENT CONTROL
SO AS TO ADOPT THE STATE OF GEORGIA'S MODEL
SOIL EROSION AND SEDIMENT CONTROL ORDINANCE;
TO PROVIDE AN EFFECTIVE DATE; TO REPEAL
CONFLICTING ORDINANCES; AND FOR OTHER
PURPOSES.
BE IT ORDAINED BY THE BOARD OF COMMISSIONERS OF RICHMOND
COUNTY, GEORGIA AND IT IS HEREBY ORDAINED BY THE AUTHORITY OF SAME
AS FOLLOWS:
Section 1. The Richmond County Code, Part II, Chapter 14
is hereby amended by deleting Sections 14-1 through 14-9 and
substituting in lieu thereof the following:
Section 14-1. Title.
This. chapter will be known as "Richmond
County Soil Erosion and Sedimentation Control
Ordinance. II
Section 14-2. Definitions.
The following definitions shall apply in the
interpretation
and
enforcement
of
this
chapter, unless otherwise specifically stated:
1
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Best Management PracticesCBMP's): A
collection of structural measures and
vegetative practices which, when properly
designed, installed and maintained, will
provide effective erosion and sedimentation
control for all rainfall events up to and
including a 25-year, 24-hour rainfall event.
Board: The Board of Natural Resources.
Buffer: An area along the course of any state
waters to be maintained in an undisturbed and
natural condition.
Commission: The State Soil & Water
Conservation Commission.
Cut: A portion of land surface or area from
which earth has been removed or will be
removed by excavation; the depth. below
original ground surface to excavated surface.
Also known as excavation.
Department: The Department of Natural
Resources.
2
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Developer: Refers to the person or persons,
corporation, or other business applying for a
permit to undertake land-disturbing activity
and performing development within the scope of
this chapter.
Development: Refers to any acti vi ty which
would alter the elevation of the land, remove
or destroy plant life, cause structures of any
kind to be installed, erected or removed, or a
change of any kind from conditions existing as
of the effective date of this chapter unless
such activity is exempted under Section 14-3
of this chapter.
Director: The Director of the Environmental
Protection Division of the Department of
Natural Resources.
District: The Brier Creek Soil and Water
Conservation District.
3
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Division:
Division
Resources.
Drainage Structure: A device composed of a
virtually nonerodible material such as
concrete, steel, plastic or other such
material that conveys water from one place to
another by intercepting the flow and carrying
it to a release point for storm-water
management, drainage control, or flood control
purposes.
Erosion: The process by which land surface is
worn away by the action of wind, water, ice or
gravity.
Erosion and Sedimentation Control Plan: A
plan for the control of soil erosion and
sedimentation resulting from a land-disturbing
activity. Also known as the "plan".
The Environmental
of the Department
Protection
of Natural
4
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Existing Grade: The vertical location of the
existing ground surface prior to cutting or
filling.
Fill: A portion of land surface to which soil
or other solid material has been added; the
depth above the original ground.
Finished Grade: The final elevation and
contour of the ground after cutting or filling
and conforming to the proposed design.
Ground Elevation: The original elevation of
the ground surface prior to cutting or
filling.
Grading: Altering the shape of ground.surfaces
to a predetermined condition; this includes
stripping, cutting, filling, stockpiling and
shaping or any combination thereof and shall
include the land in its cut or filled
condition.
5
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Issuing Authority: The governing authority of
any county or municipality which has been
certified by the Director of the Environmental
Protection Division of - the Department of
Natural Resources as an Issuing Authority,
pursuant to the Erosion and Sedimentation Act
of 1975, as amended, or the Division of those
instances where an application for a permit is
submitted to the Division.
Land-Disturbinq Activity: Any activity which
may result in soil erosion from water or wind
and the movement of sediments into state
waters or onto lands within the state,
including, but not limited to, clearing,
dredging, grading, excavating, transporting
and filing of land but not including
agricultural practices as described in Section
III, Paragraph 5.
6
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Metropolitan River pro.tection Act (MRPA): A
state law referenced as O.C.G.A. 12-5-440, et
seq. , which addresses environmental and
developmental matters in certain metropolitan
river corridors and their drainage basins.
Mulching: Refers to the application of plant
or other suitable materials in the soil
surface to conserve moisture, hold soil in
place, 'and aid in establishing plant cover.
Natural Ground Surface: The ground surface in
its original state before any grading,
excavation or filling.
Nephelometric Turbidity Units (NTU): Numerical
units of measure based upon photometric analytical
techniques for measuring the light scattered by
finely divided particles of a substance in
suspension. This technique is used to estimate the
extent of turbidity in water in which colloidally
dispersed particles are present.
7
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
One Hundred Year Flood Plain: Land in the
flood plain subject to a one percent or
greater statistical occurrence probability of
flooding in any given year.
Permit: The authorization necessary to conduct
a land-disturbing activity under the
provisions of this ordinance.
Person: Any individual, partnership, firm,
association, joint venture, public or private
corporation, trust, estate, commission, board,
public or private institution, utility,
cooperative, state agency, municipality or
other political subdivision of this State, any
interstate body or any other legal entity.
Planning Commission: The Augusta-Richmond
County Planning Commission.
Project: The entire proposed development
project regardless of the size of the area of
land to be disturbed.
8
I'
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
\
Roadway Drainage Structure: A device such as a
bridge, culvert, or ditch, composed of a
virtually nonerodible material such as
concrete, steel, plastic, or other such
material that conveys water under a roadway by
intercepting the flow on one side of a
traveled way consisting of one or more defined
lanes, with or without shoulder areas, and
carrying water to a release point on the other
side.
Sediment: Solid material, both organic and
inorganic, that is in suspension, is being
transported, or has been moved from its site
of origin by air, water, ice, or gravity as a
product of erosion.
Sedimentation: The process by which eroded
material is transported and deposited by the
action of water, wind, ice or gravity.
9
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Soil and Water Conservation District Approved
Plan: An erosion and sedimentation control
plan approved in writing by the Brier Creek
soil and water conservation district.
Soil Erosion and Sediment Control Measures:
Re~ers to mechanical measures used to reshape
the land to intercept, divert, convey, retard,
or otherwise control runoff including, but not
limited to, land grading, bench terraces,
subsurface drains , diversions, berms, storm
sewers, outlets, waterway stabilization
structures, lined channels, sediment and
debris basins, and stream channel and bank
stabilization; and vegetative measures to
provide temporary cover to help control
erosion during construction and permanent
cover to stabilize the site after construction
is complete.
10
I
I
I
I
I
I
I
I
I
I
'1.
I
I
I
I
I
I
I
I
Stabilization: The process of establishing an
enduring soil cover of vegetation by the
installation of temporary or permanent
structures for the purpose of reducing to a
minimum the erosion process and the resultant
transport of sediment by wind, water, ice or
gravity.
State Waters: Any and all rivers, streams,
creeks, branches, lakes, reservoirs, ponds,
drainage system, springs, wells, and other
bodies of surface or subsurface water, natural
or artificial, lying within or forming a part
of the boundaries of the State which are not
entirely confined and retained cQmpletely upon
the property of a single individual,
partnership, or corporation.
Structural Erosion and Sedimentation Control
Measures: Measures for the stabilization of
erodible or sediment-producing areas by
utilizing the mechanical properties of matter
11
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
for the purpose of either changing the surface
of the land or storing, regulating or
disposing of runoff to prevent excessive
sediment loss. Examples of structural erosion
and sediment control practices are riprap,
sediment basins, dikes, level spreaders,
waterways or outlets , diversions, grade
stabilization structures, sediment traps and
land grading, etc. Such measures can be found
in the publication Manual for Erosion and
Sediment Control in Georgia.
Trout Streams: All streams or portions of
streams within the watershed as designa:ted by
the Game and Fish Division of the Georgia
Department of Natural Resources under the
provisions of the Georgia Water Quality
Control Act, O.C.G.A. 12-5-20 et seq. Streams
designated as primary trout waters are defined
as water supporting a self-sustaining
population of rainbow, brown or book trout.
12
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Streams designated as secondary trout water
are those in which there is no evidence of
natural trout reproduction, but are capable of
supporting trout throughout the year. First
order trout waters are streams flow except
springs.
Veaetative Erosion and Sedimentation Control
Practices: Practices for the stabilization
of erodible or sediment- producing areas by
covering the soil with:
(a) Permanent seeding, sprigging or
planting, producing long-term vegetative
cover; or
(b) Temporary seeding, producing short-term
vegetative cover; or
(c) Sodding, covering areas with a turf of
perennial sod-forming grass.
Such practices can be found in the publication
Manual for Erosion and Sediment Control in
Georgia.
13
Il
I
I
I
I
,I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Watercourse: Any natural or artificial
watercourse, stream, river, creek, channel,
ditch, canal, conduit, culvert, drain,
waterway, gully, ravine, or wash in which
water flows either continuously or
intermittently and which has a definite
channel, bed and banks, and including any area
adjacent thereto subject to inundation by
reason of overflow or floodwater.
Wetlands: Those areas that are inundated or
saturated by surface or ground water at a
frequency and duration sufficient to support,
and that under normal circumstances do support
a prevalence of vegetation typically adapted
for life in saturated soil conditions.
Wetlands generally include swamps, marshes,
bogs, and similar areas.
14
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
i
I
Section 14-3. Exemptions.
This ordinance shall apply to any land-
disturbing activity undertaken by any person
on any land except for the following:
(1) Surface mining, as same is defined in
O.C.G.A. 12-4-72.
(2) Granite quarrying and land clearing for
such quarrying.
(3) Such minor land-disturbing activities as
,home gardens and individual home landscaping,
repairs, maintenance work, and other related
activities which result in minor soil erosion;
(4) The construction of single-family
residences, when such are constructed by or
under contract with the owner of his or her
own occupapcy, or the construction of single-
family residences not a part of a platted
subdivision, a planned community, or an
association of other residential lots
consisting of more than two lots and not
15
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
oth~rwise exempted under this paragraph;
provided, however,. that construction of any
such residence shall conform to the minimum
requirement as set forth in Section IV of this
ordinance. For single-family residence
construction covered by the provisions of this
paragraph, there shall be a buffer zone
between the residence and any state waters
classified as trout streams pursuant to
Article 2 of Chapter 5, of the Georgia Water
Quality Control Act. In any such buffer zone,
no land-disturbing activity shall be
constructed between the residence and the
point where vegetation has been wrested by
normal stream flow or wave action from the
banks of the trout waters. For primary trout
waters, the buffer zone shall be at least 50
horizontal feet~ and no variance to a smaller
buffer shall be granted. For secondary trout
water, the buffer zone shall be at least 50
16
I
I
I
I
I
'1
I
I
I
I
I
I
I
I
I
I
I
I
I
horizontal feet, but the director may grant
variances to no less than 25 feet. Regardless
of whether a trout stream is primary or
secondary, for first order trout waters, which
are streams into which no other streams flow
except for springs, the buffer shall be at
least 25 horizontal feet, and no variance to a
smaller buffer shall be granted. The minimum
requirements of Section IV of this ordinance
and the buffer zones provided by this section
shall be enforced by the issuing authority.
(5) Agricultural operations as defined in
O.C.G.A. 1-3-3 to include raising, harvesting
or storing of products of the field or
orchard; feeding, breeding 'or managing
Ii vestock or poultry; producing. o.r storing
feed for use in the production of livestock,
including but not limited to cattle, calves,
swine, hogs, goats, sheep, and rabbits or for
use in the production of poultry,. including
17
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
but not limited to chicken, hens and turkeys;
producing plants, trees, fowl, or animals; the
production of aqua culture, horticul tural,
dairy, livestock, poultry, eggs and apiarian
products; forestry land management practices,
including harvesting and farm buildings and
farm ponds.
(6) Any project carried out under the
technical supervision of the Natural Resources,
Conservation Service of the United States
Department of Agriculture.
(7) Any project involving one and one-tenth
acres or less; provided, however, that this
exemption shall not apply to any land-
disturbing activity within 200 feet of the
bank of any state waters, and for purposes of
this paragraph, "State Waters" excludes
channels and drainageways which have water in
them only during and immediately after
rainfall events and intermittent streams which
18
I.'
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
do not have water in them year-round;
provided, however, that any person responsible
for a project which involves one and one-tenth
acres or less, which involves land-disturbing
activity, and which is within 200 feet of any
such excluded channel or drainageway, must
prevent sediment from moving beyond the
boundaries of the property on which such
project is located and provided, further, that
nothing contained herein shall prevent the
issuing authority from regulating any such
project which is not specifically exempted by
paragraphs 1, 2, 3, 4, 5, 6, 8, or 9 of this
section.
(8) Construction or maintenance projects, or
both, undertaken or financed in whole or in
part, or both, by the Department of
Transportation, the Georgia Highway Authority,
or the Georgia Tollway Authority; or any road
construction or maintenance project, or both,
19
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
v
undertaken by any county or municipality;
provided, however, that such projects shall
conform to the minimum requirements set forth
in Section 14-4 of this ordinance.
(9) Any land-disturbing activities conducted
by any electric membership corporation or
municipal electrical system or any public
utility under the regulatory jurisdiction of
the Public Service Commission, provided that
any such land-disturbing activity shall
conform to the minimum requirements set forth
in Section 14-4(b) and (c).
Where this section requires compliance with
the minimum requirements set forth in Section
14-4 (b) and (c) of this ordinance, issuing
authorities' shall enforce compliance with the
minimum requirements as if a permit had been
issued and violations shall be subject to the
same penalties as violations. by permit
holders.
20
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Section 14-4. Minimum requirements for erosion
and sedimentation control using best
management practices.
(a) General Provisions.
Excessive soil erosion and resulting
sedimentation can take place during land-
disturbing activities. Therefore, plans for
those land-disturbing activities which are not
excluded by this chapter shall contain
provisions for application of soil erosion and
sedimentation control measures and practices.
The provisions shall be incorporated into the
erosion and sedimentation control plans. Soil
erosion and sedimentation control measures and
practices shall conform to the minimum
requirements of Section 14-4 (b) and (c) of
this chapter. The application of measures and
practices shall apply to all features of the
site, including street and utility
installations, drainage facilities and other
21
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
temporary and permanent improvements.
Measures shall be installed to prevent or
\
control erosion and sedimentation pollution
during all stages of any land-disturbing
activity.
(b) Minimum requirements/ BMP's.
(1) Best management practices as set forth
in Section 14-4 (b) and (c) of this chapter
shall be required for all land-disturbing
activities. Proper design, installation, and
maintenance of best management practices shall
constitute a complete defense to any action by
the Director or to any other allegation of
noncompliance with paragraph (2) of this
subsection or any substantially similar terms
contained in a permit for the discharge of
stormwater issues pursuant to subsection (f)
of Code Section 12-5-30. As used in this
subsection, the term "proper design" and
"properly designed" mean designed to control
22
I
I
I
I
I
I
I
I
I
I-
\...
I
I
I
I
I
I
I
I
I
soil erosion and sedimentation for all
rainfall events up to and including a 25-year,
24 hour rainfall event.
(2) A discharge of storrnwater runoff from
disturbed areas where best management
practices have not been properly designed,
installed, and maintained shall constitute a
separate violation of any land-disturbing
permit issued by a local issuing authority or
by the Division or of any general permit for
construction activities issued by the Division
pursuant to subsection (f) of Code Section 12-
5-30 for each day on which such discharge
results in the turbidity of receiving waters
being increased.by more than 25 nephelometric
turbidi ty uni ts for waters supporting warm
water fisheries or by more than ten
nephelometric turbidity units for waters
classified as trout waters. The turbidity of
the receiving waters shall be measured in
23
I
I
I
I
I
I
I
I
I
I
I
I.
I
I
I
I
I
I
I
accordance with'guidelines- to be issued by the
Director.
(3) Failure to properly design, install,
or maintain best management practices shall
constitute a violation of any land-disturbing
permit issued by a local issuing authority or
by the Division or of any general permit for
construction activities issued by the division
pursuant to subsection (f) Code Section 12-5-
30 for each day on which such failure occurs.
(4) The Director may require, in
accordance with the regulations adopted by the
Board, reasonable and prudent monitoring of
the turbidity level of receiving waters into
which discharges from land-disturbing
activities occur.
(c) The rules and regulations, ordinances, or
resolutions adopted pursuant to this chapter
for the purpose of governing land-disturbing
activities shall require, as a minimum, best
24
I
I
I
I'
I
I
I
I
I
I-
I
I
I
I
I
I
I
I
I
management practices, including. sound
conservation and engineering practices to
prevent and minimize erosion and resultant
sedimentation, .which are consistent with, and
no less stringent than, those practices
contained in the "Manual for Erosion and
Sediment Control in Georgiall published by the
Georgia Soil and Water Conservation Commission
as of January 1 of the year in which the land-
disturbing activity was permitted, as well as
the following:
(1) Stripping of vegetation, regrading and
other development activities shall be
conducted in a manner so as to minimize
erosion;
(2) Cut-fill operations must be kept to a
minimum;
(3) Development plans must conform to
topography and soil type so as to create the
lowest practical erosion potential;
25
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
(4) Whenever feasible, natural vegetation
shall be retained, protected and supplemented;
(5) The disturbed area and the duration of
exposure to erosive elements shall be kept to
a practicable minimum;
(6) Disturbed soil shall be stabilized as
quickly as practicable;
(7) Temporary vegetation or mulching shall
be employed to protect exposed critical areas
during development;
(8) Permanent vegetation and structural
erosion control measures shall be installed as
soon as practicable;
(9) To the extent necessary, sediment in
run-off water must be trapped by the use of
debris basins, sediment basins, silt traps, or
similar measures until the disturbed area is
stabilized. As use in this paragraph, a
disturbed area is stabilized when it is
brought to a condi tion of continuous
26
I
I
I
I
I
I
I
I
I
I-
I
I
I
I
I
I
I
I
I
compliance with the requirements of this
chapter;
(1~) Adequate provisions must be provided
to minimize damage from surface water to cut
face of excavations or the sloping surface of
fills;
(11) Cuts and fills may not endanger
adjoining property;
(12) Fills may no~ encroach upon natural
watercourses or constructed channels in a
manner so as to adversely affect other
property owners;
(13) Grading equipment must cross flowing
streams by means of bridges or culverts except
when such methods are not feasible, provided,
in any case, that such crossings are kept to a
minimum;
(14) Land-disturbing activity plans for
erosion and sedimentation control shall
include p~ovisions for treatment or control of
27
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
any source of sediments and adequate
sedimentation control facilities to retain
sediments on-site or preclude sedimentation of
adjacent waters beyond the levels specified in
Section 14-4 (b) and (c) of this chapter of
this Code section;
(15) Land-disturbing activities shall not
be conducted within 25 feet of the banks of
any state waters, as measured from the point
where vegetation has been wrested by normal
stream flow or wave action, except where the
Director determines to allow a variance that
is at least as protective of natural resources
and the environment, where otherwise allowed
by the Director pursuant to Code Section 12-2-
8, or where a .drainage structure or a roadway
drainage structure must be constructed,
provided that adequate erosion control
measures are incorporated in t~e project plans
and specifications and are implemented;
28
I
I
I
I
I
I
I
I
I
~_..
I
I
I
I
I
I
I
I
-
provided, however, that buffers of at least 25
feet established pursuant to Part 6 of Article
5 of .Chapter 5, the IDMetropolitan River
Protection Act" shall remain in force unless a
variance is granted by the Directors as
provided in this paragraph; and
(16) Land-disturbing activities shall not
be conducted within 100 horizontal feet, as
measured from the point where vegetation has
been wrested by normal stream flow or wave
action, of the banks of any state waters
classified as "trout steams" pursuant to
Article 2 of Chapter 5 of the "Georgia Water
Quality Act", unless a variance for such
,.
activity is granted by the Director except
where a roadway c:lrainage structure must be
constructed, provided that adequate erosion
control measures are incorporated in the
project plans and specifications and are
implemented.
29
-
-
-
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
(d) Noting contained in this chapter shall
prevent an Issuing Authority from adopting
rules and regulations, ordinances, or
resol utions which contain requirements that
exceed the minimum requirements in Section 14-
4(b) and (c) of this chapter.
(e) The fact that land-disturbing activity for
which a permit has been issued results in
injury to the property of another shall
neither constitute proof of nor create a
presumption of a violation of the standards
provided for in this chapter or the terms of
the permit.
Section 14-5. Application/Permit Process.
(a) General.
The property owner, developer and designated
planners and engineers shall review the
general development plans and detailed plans
of the Issuing Authority that affect the tract
to be developed and the area surrounding it.
30
I
I
I
I
I
I
I
I
I
~
'-
I
I
I
I
I
I
I
I
I
They shall review the zcning ordinance,
stormwater management ordinance, subdivision
ordinance, flood damage prevention ordinance,
this ordinance, and other ordinances which
regulate the development of land within the
jurisdictional boundaries of the Issuing
Authori ty . However, the property owner is the
only party that can obtain a permit.
(b) Application Requirements.
(1). No person shall conduct any land-
disturbing activity within the jurisdictional
boundaries of unincorporated Richmond County
wi thout first obtaining a permit from the
Augusta-Richmond County Planning Commission
(the "Issuing Authority") to perform _ such
activity.
(2) The application for a permit shall be
submi tted to the Issuing Authority and must
include the applicant's erosion and
sedimentatio-n control plan wi t.ll supporting
31
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
data, as necessary. Said plans shall include,
as a minimum, the data specified in Section
14-S(c) of this chapter. Soil erosion and
sedimentation control plans shall conform to
the provisions of Section 14-4(b) and (c) of
this chapter. Applications for a permit will
not be accepted unless accompanied by six (6)
copies of the applicant's soil erosion and
sedimentation control plans.
(3) Immediately upon receipt of an
application and plan for a permit, the Issuing
Authority shall refer the application and plan
to the county engineer and the District for
its review and approval or disapproval
concerning the adequacy of the erosion and
sedimentation control plan. The results of
the District review shall be forwarded to the
Issuing Authority. No permit will be issued
unless the plan has been approved by the
District, and any variances required by
32
I
I
I
I
I
I
I
I
I
I.~
;
....
I
Section 14-4(b)(15) and (16) and bonding, if
required as per Section 14-5 (b) (5) (b), .have
been obtained. Such review will not be
required if the Issuing Authority and the
District have entered into an agreement which
allows the Issuing Authority to conduct such
review and approval of the plan without
referring the application and plan to the
District.
(4) (a) If a permit applicant has had two
or more violations of previous permits, this
chapter, or the Erosion and Sedimentation Act,
as amended wi thin three years prior to. the
date of filing of the application under
consideration, the Issuing Authority may deny
the permit application.
(b) The Issuing Authority may require
the permit applicant to post a bond in the
form of government security, cash, irrevocable
letter of credit, or any combination thereof
-
.
.
.
-
33
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
up to, but not exceeding, $3,000.00 per acre
or fraction thereof of the proposed land-
disturbing activity, prior to issuing the
permit. If the applicant does not comply with
this chapter or with the conditions of the
permit after issuance, the Issuing Authority
may call the bond or any part thereof to be
forfeited and may use the proceeds to hire a
contractor to stabilize the site of the land-
disturbing activity and bring it into
compliance. These provisions shall not apply
unless there is in effect an ordinance or
statute specifically providing for hearing and
judicial review of any determination or order
of the Issuing Authority with respect to
alleged permit violations.
34
I
I
I
I
I
I
I
I
.
.
(c) Plan Requirements.
( 1 ) Plans must be prepared to meet the
minimum requirements as contained. in Section
14-4(b) and (c) of this chapter. Conformance
with the minimum requirements may be attained
through the use of design criteria in the
current issue of the Manual for Erosion and
Sediment Control in Georcria, published by the
State Soil and Water ~onservation Commission
as a guide; or through the use of alternate
design criteria which conform to sound
conservation and engineering practices. The
Manual for Erosion and Sediment Control in
Georaia is hereby incorporated by reference
into this chapter. The plan for the land-
disturbing acti~ity shall consider the
interrelationship of the soil types,
geological and hydrological characteristic's,
topography, watershed, vegetation, proposed
permanent. ... structures including roadways,
.
...
.
.
-
-
..
-
35
~
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
:01
-
constructed waterways, sediment control and
storm water management facilities, local
ordinances and State laws.
(2) Data Required for Site Plan.
(a) Narrative or notes, and other
information: Notes or narrative to be located
on the site plan in general notes or in
erosion and sediment control notes.
(b) Description for existing land use at
project site and description of project site
and description of proposed project.
(c) Name, address, and phone number of
the property owner.
(d) Name and phone number of
local contact who is responsible for
and sedimentation controls.
(e) Size of project, or phase under
construction, in acres.
(f) Activity schedule showing anticipated
starting and completion dates for the
24-:hour
erosion
36
I
I
I
I
I
I
I
I.
I
l-
i\...
I
I
I
I
I
I'
I
I
I
project. Including the statement in bold
letters, that "the installation of erosion and
sedimentation control measures and practices
shall occur prior to or concurrent with land-
disturbing activities".
(g) Stormwater and sedimentation
management systems-storage capaci ty,
hydrologic study, and calculations, including
off-site drainage areas.
(h) Vegetative plan for all temporary and
permanent vegetative practices, including
species, planting dates, and seeding,
fertilizer, lime, and mulching rates. The
vegetative plan should show options for year-
round seeding.
( i) Detail drawings for all structural
practices. Specifications. . . may" allow
guidelines set forth in the Manual for Erosion
and Sediment Control in Georaia.
37
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
(j) Maintenance Statement - "Erosion and
sedimentation control measures will be
maintained at all times. Additional erosion
and sedimentation control measures and
practices will be installed if deemed
necessary by onsite inspection."
(3) Maps, drawings, and supporti ve
computations shall bear the signature/seal of
a registered or certified professional in
engineering, architecture, landscape
architecture, land surveying, or erosion and
sedimentation control. The certified plans
shall contain:.
(a) Graphic sale and north point or arrow
indicating magnetic north.
(b) Vicinity maps showing location of
project and existing streets.
(c) Boundary line survey.
(d) Delipeation of disturbed areas within
project boundary.
38
I
I
I
I
I
I
I
I
I
I-
L
I
I
I
I
I
I
I
I
I
(e) Existing and planned contours, with
contour lines drawn wi thin. an interval in.
accordance with the following:
Map Scale Ground Slope Contourlnterval,feet
1 inch = 100 ft. or Flat 0-2 % 0.5 or 1
larger scale Rolling 2 - 8 % 1 or 2
Steep 8 % + 2.5 or 10
(f) Adjacent areas and features areas such as
streams, lakes, residential areas, etc. which might be
affected should be indicated on the plan.
(g) Proposed structures or additions to
existing structures and paved areas.
(h) Delineate the 25-foot horizontal
buffer adjacent to state waters and the
specified width in MRPA areas.
( i ) Deli,neate the specified horizontal
buffer along designated trout streams, where.
applicable.
39
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
(j) Location of erosion and
sedimentation control measures and practices
using coding symbols from the Manual for
Erosion and Sediment Control in Georqia,
Chapter 6.
(4) Maintenance of all soil erosion and
sedimentation control practices, whether
temporary or permanent, shall be at all times
the responsibility of the property owner.
(d) Permits.
(1) Permits shall be issued or denied as
soon as practicable but in any event not later
than forty-five (45) days after receipt by the
Issuing Authority of a completed application,
providing variances and bonding are obtained,
where necessary.
(2) No permit shall be issued by the
Issuing Authority unless the erosion and
sedimentation control plan has been approved
by the District and the Issuing Authority has
40
I
I
I
I
I
I
I
I
I
~.
I
I
I
I
I
I
I
I
I
affirmatively determined that the plan is in
compliance with this ordinance, any variances
requir~d by Section 14-4(b)(lS) and (16) are
obtained, bonding requirements if necessary,
as per Section 14-S(b)(4)(b) are met and all
ordinances and rules and regulations in effect
within the jurisdictional boundaries of the
Issuing Authority are met. If the permit is
~
denied, the reason :tor denial shall be
furnished to the applicant.
( 3 ) If the tract is to be developed in
phases, then a separate permit shall be
required for each phase.
(4 ) The permit may be suspended, . revoked
or modified by the Issuing Authority, as to
all or any portion of the land affected by the
plan~ upon finding that the holder or .his
successor in the title is not in compliance
wi th the approved erosion and sedimentation
control plan or that 'the holder or his
41
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
successor in title is in violation of this
ordinance. A holder of a permit shall
notify any successor in title to him as to all
or any portion of the land affected by the
approved plan of the conditions contained in
the permit.
(5) No permit shall be issued unless the
applicant provides a statement by the office
of the Richmond County tax commissioner
certifying that all ad valorem taxes levied
against the property and due and owing have
been paid.
Section 14-6. Inspection and Enforcement.
(a) The Richmond County Engineering
Department will periodically inspect the sites
of land-disturbing acti vi ties for which
permits have been issued to determine if the
activities are being conducted in accordance
with the plan and if the measures required in
the plan are effective in controlling erosion
42
I
I
I
I
I
I
I
I
I
I--
I
I
I
I
I
I
I
I
I
and sedimentation. If, through inspection, it
is deemed that a person engaged in land-
disturbing acti vi ties as defined. herein has
failed to comply with the approved plan, with
permit conditions, or with the provisions of
this ordinance, a written notice to comply
shall be served upon that person. The notice
shall set forth the measures necessary to
achieve compliance and shall state the time
within which such measures must be completed.
If the person engaged in the land-disturbing
activity fails to comply within the time
specified, he shall be deemed in violation of
this ordinance.
(b) The Richmond County Engineering
Department shall have the power to conduct
such investigations as it may reasonably deem
necessary to c~rry out duties as prescribed in
this ordinance, and for this purpose to enter
at reasonable times upon any property, public
43
I
I
I
I
I
I
I
I
I
I
I
I
i
I
I
I
I
I
I
or private, for the purpose of investigation
and inspecting the sites of land-disturbing
activities.
(c) No person shall refuse entry or access to
any authorized representative or agent of the
Issuing Authority, the Commission, the
District, or Division who requests entry for
the purposes of inspection, and who presents
appropriate credentials, nor shall any person
obstruct, hamper or interfere with any such
representative while in the process of
carrying out his official duties.
(d) The Districts or the Commission or both
shall periodically review the actions of
counties and municipalities which have been
certified as issuing authorities pursuant to
O.C.G.A. 12-7-8(a). The Districts or the
Commission or both may provide technical
assistance to any county or municipality for
the purpose of improving the effectiveness of
44
I
I
I
I
I
I
I
I
I
~,.
.......
I
I
I
I
I
I
I
I
I
the county's. or municipality's erosion and
sedimentation control program. The Districts
or the Commission shall notify th~ Division
and request investigation by the Division if
any deficient or ineffective local program is
found.
(e) The Division may periodically review the
actions of counties and municipalities which
have been certified as issuing authorities
pursuant to Code Section 12-7-8 (a) . Such
review may include, but shall not be limited
to, review of the administration. and
enIorcement of a governing authority's
ordinances and review of conformance with an
agreement, if any, between the district and
the governing authority. If such review
indicates that the governing authority of any
county or municipality certified pursuant to
O.C.G.A. 12-7-8(a) has not administered or
enforced its ordinances or has not conducted
45
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
the program in accordance with any agreement
entered into pursuant to O.C.G.A. 12-7-7(d),
the Division shall notify the governing
authority of the county or municipality in
wri ting. The governing authority of any
county or municipality so notified shall have
30 days within which to take the necessary
corrective action to retain certification as
an issuing authority. If the county or
municipality does not take necessary
correction action with 30 days after
notification by the division, the division may
revoke the certification of the county or
municipality as an issuing authority.
Section 14-7. Penalties and Incentives.
(a) Failure to obtain a permit for land-
disturbing activity.
If any person commences any land-disturbing
activity requiring a land-disturbing permit
46
I
I
I
I
I
I
I
I
I
1--
'~
I
I
I
I
I
I
I
I
I
as prescribed in this ordinance without first
obtaining said permit, the person shall be
subject to revocation of his business license,
work permit or other authorization for the
conduct of a' business and associated work
activities within the jurisdictional
boundaries of the Issuing Authority.
(b) Stop-Work Orders.
Upon notice from the Issuing Authority or its
agent, work on any project that is being done
contrary to the provisions of this ordinance
or in a dangerous or unsafe manner, shall be
immediately stopped. Such notice shall be in
writing and shall be given to the owner of the
property, his authorized agent or the person
or persons in charge of the activity on the
property, and shall state the conditions under
which work may be resumed. Where an emergency
exists, no written notice shall be required.
47
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
(c) Bond Forfeiture.
If, through inspection, it is determined that
a person engaged in land-disturbing activities
has failed to comply with the approved plan, a
written notice to comply shall be served upon
that person. The notice shall set forth the
measures necessary to achieve compliance with
the plan and shall state the time within which
such measures must be completed. If th~
person engage in the land-disturbing activity
fails to comply, within the time specified, he
shall be deemed in violation of this
ordinance, and, in addition to other
penalties, shall be deemed to have forfeited
his performance.bond, if required to post one
under the provisions of Section VB. 5 (b) .
The Issuing Authority may call the bond or any
part thereof to be forfeited and may use the
proceeds to hire a contractor to stabilize the
site of the land-disturbing activity and bring
48
I
I
I
I
I
I
I
I
I
I-
_.
I
I
I
I
I
I
I
I
I
it into compliance.
(d) Monetary Penalties.
Any person violating any provisions of this
ordinance, permitting conditions or stop-work
order shall be liable for a monetary penalty
not to exceed $2,500 per day, by a sentence of
imprisonment not exceeding 60 days in jailor
both fine and jailor work alternative. Each
day during which the yiolation or failure or
refusal to comply continues shall constitute a
separate violation.
Section 14-8. Administrative Appea~, Judicia~
Review
(a) Administrative Remedies.
The suspension, revocation, modification or
grant with condition of a permit by the
Issuing Authority upon finding that the holder
is not in compliance with the approved erosion
and sediment. control plan; or that the holder
49
I
I
I
I
I
,I
I
I
I
I
I
I
I
I
I
I
I
I
I
is in violation of permit conditions; or that
the holder is in violation of any ordinance;
shall entitle the persons submitting the plan
or holding the permit to a hearing before the
Issuing Authority within 30 days after the
receipt of the Issuing Authority of written
notice of appeal.
(b) Judicial Review.
Any person, aggrieved by a decision or order
of the Issuing Authority, after exhausting his
administrative remedies, shall have the right
to appeal de novo to the Superior Court of
Richmond County, Georgia.
Section 14-9. Validity and Liability.
(a) Validity.
If any section, paragraph, clause, phrase, or
provision of this ordinance shall be adjudged
invalid or held unconstitutional, such
decisions shall not effect the remaining
50
I
I
I
I
I
I
I
I
I
I
l.....
I
I
I
I
I
I
I
I
I
portions of this ordinance.
(b) Liability.
(1) Neither the approval of a plan under
the provisions of this ordinance, nor the
compliance with provisions of this ordinance
shall :-elieve any person from the
responsibili ty ::or damage to any person or
property other~ise irnDosed by law nor lmpose
any liability upon the Issuing Authority or
Distric~ for damage to any person or property.
(Z) The fact ~hat a land-disturbing
acti vi ty for which a permit has been issued
results in inju~j to the proper~y of another
shall neither constitute proof of nor create
a presumption of a violation of the standards provided
for in this ordinance or the terms of the permit.
Section 2. This ordinance shall become effective upon
adoption.
Section 3. ~~l ordinances or parts of ordinances in conflict
51
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
with this ordinance are hereby repealed.
APPROVED this ~ day of Octobe
gfpJ
MMISSrGNERS
EORGIA
52
I
I
TITLE FIVE
I
UTILITIES
I
CHAPTBR 1
I
STORM WATBR MANAGEMENT
s
5-1-1.
GENERALLY.
I
This Chapter shall be known as the Storm Water Management
Ordinance of Augusta-Richmond County.
s
5-1-2.
FINDINGS.
I
(a) Uncontrolled storm water drainage/discharge may have a
significant, adverse impact on the health, safety, and welfare of the citizens
of Augusta-Richmond County. Surface water runoff can carry pollutants and _
nutrients into receiving waters.
I
(b) Uncontrolled storm water drainage can increase the incidence
of flooding and the level of floods which occur, endangering roads, other
public and private property and human life.
I
(c)
Altered land surfaces can change the rate and volume of
runoff.
I
(d) Adverse water quality and quantity consequences described
above could result in substantial economic losses. Potential losses include,
but' are not limited to, increased water treatment costs, as well as state and
federal fines associated with water qu?lity violations.
I
(e) Many future problems can be avoided through proper storm
water management.
I
(f) Every parcel of real property, both public and private,
either uses or benefits from the maintenance of Augusta-Richmond County's
storm water system.
I
(g) Current and anticipated growth will contribute to and
increase the need for improvement and maintenance of the storm water system.
I
s
5 -1- 3 . OBJECTIVES.
The objectives of this chapter include the following:
I
(a) To protect, maintain, and enhance the public health, safety,
and general welfare. This objective will be achieved by providing for
regulation and management of Augusta-Richmond County's storm water system,
including public and private facilities in Augusta-Richmond County.
(b) To comply with State Department of Natural Resources and
Federal Environmental Protection Agency storm water regulations developed
pursuant to the Federal Clean Water Act. These requirements include:
(1) Control of the contribution of pollutants to the
municipal storm sewer ~ystem by storm water discharges associated with
commercial and industrial activity and the quality of storm water discharged
from sites of commercial and industrial activity;
I
I
I
(2)
Prohibition of illicit connections to municipal
I
I
I
separate storm sewers;
I
(3) Control of discharge to municipal separate storm
sewers of spills, dumping or disposal of materials other than storm water;
and,
I
(4) Control, through intergovernmental agreements, of
contribution of pollutants from one municipal system to another.
s
5-1-4.
DEFINITIONS.
I
(a) For the purposes of this chapter, unless specifically
defined below, words or phrases shall be interpreted so as to give them the
,meaning they have in common usage and to give this chapter its most effective
application. Words in the singular shall include the plural, and words in the
plural shall include the singular. Words used in the present tense shall
include the future tense. The word shall connotes mandatory and not
discretionary; the word may is permissive.
I
I
(b) Unless otherwise specified, or it is apparent from the
context, definitions herein will be the same as those in other Augusta-
Richmond County Ordinances and as used elsewhere in this code.
I
(1) Accidental discharge. A discharge prohibited by this
chapter into the municipal storm sewer system which occurs by chance and
without planning or consideration prior to occurrence.
I
(2) Appeals authority. The Augusta-Richmond County
Commission, one of whose purpose is to review appeals to this chapter and
render decisions and variances.
I
(3) Best Management Practices (BMPs). A wide range of
management procedures, activities, and prohibitions on practices which control
the quality and/or quantity of storm w?ter runoff and which are compatible
with the planned land use.
I
(4) Clean Water Act. The Federal Water Pollution Control
Act, as amended (33 U.S.C. 1251 et seq.).
I
(5) Cooling water. Water used exclusively as a cooling
medIum in an appliance, device or apparatus.
I
(6) Conveyance. Storm water features designed for the
movement of storm water through the drainage system, such as concrete or metal
pipes, ditches, depressions, or swales.
I
(7) Department. The department of public works
responsible for all storm water management activities and implementation of
the provisions of this chapter.
I
(8) Development means:
I
a. The division of a lot, tract or parcel of land
into two (2) or more lots, plots, sites, tracts, parcels or other divisions by
plat or deed;
b. The construction, installation, or alteration of
a structure, impervious surface, or drainage facility;
I
c. Clearing, scraping, grubbing, or otherwise
significantly disturbing the soil, vegetation, mud, sand or rock or a site; or
I
d. Adding, removing, exposing, excavating,
leveling, grading, digging, burrowing, dumping, piling, dredging, or otherwise
disturbing the soil, vegetation mud, sand or rock of a site.
I
I
I
I
(9) Director. Either the director of department of public
works or any duly authorized representatives of the director.
I
(10) Easement. An acquired legal right for the specific
use of land owned by others.
Commission.
(11) Governing body. The Augusta-Richmond County
I
I
(12) Illicit connection. A connection to a municipal
separate storm sewer system which results in discharge that is not composed
entirely of storm water runoff, except discharges pursuant to a NPDES permit
(other than the NPDES permit for discharges from the municipal separate storm
sewer) .
I
(13) Maintenance. Any action necessary to preserve storm
water management facilities in proper working condition, in order to serve the
intended purposes set forth in this chapter and to prevent structural failure
of such facilities.
I
(14) Municipal storm sewer system. A conveyance or system
of conveyances (including roads with drainage systems, highways, rights-of-
way, municipal streets, catch basins, curbs, gutters, ditches, man-made
channels, storm drains, detention ponds, other stormwater facilities) which
is:
I
a.
Owned or operated by Augusta-Richmond County;
I
storm water;
b. Designed or used for collecting or conveying
c.
Not a combined sewer; and,
I
d.
Not a part of a Publicly Owned'Treatment Works
(POTW) .
I
(15) National Pollutant Discharge Elimination System
(NPDES). A regulatory mechanism established by the U.S. Environmental
Protection Agency pursuant to the Water Quality Act and the Clean Water Act
with'permit application requirements as set forth in 55FR47990 as implemented
by the Georgia Environmental Protection Division of the Department of Natural
Resources in accordance with the State Water Quality Control Act, O.C.G.A. ~
12 -5-21,.
I
I
(16) Person. Any and all persons, natural or artificial
and includes any individual, firm, corporation, government agency, business
trust, estate, trust, partnership, association, two (2) or more persons having
a joint or common interest, or any other legal entity.
I
(17) Pollution. The contamination or other alteration of
any water's physical, chemical or biological properties, including change in
temperature, taste, color turbidity, or odor of such waters or the discharge
of any liquid, gaseous, solid, radioactive, or other substance into any such
waters as will or is likely to create a nuisance or render such waters
harmful, detrimental or injurious to the public health, safety or welfare or
to domestic, commercial, industrial, agricultural, recreational, or other
legitimate beneficial uses, or to livestock, wild animals, birds,' fish or
other aquatic life.
I
I
(18) Private. Property or facilities owned by individuals,
corporations, and other organizations and not by city, state, or federal
government.
I
(19) Procedure. A procedure adopted by the utility, by and
I
I
I
I
through the director of public works, to implement a regulation or regulations
adopted under this chapter, or to carry out other responsibilities as may be
required by this code or other codes, ordinances or resolutions of Augusta-
Richmond County.
I
(20) Regulation. Any regulation, rule or requirement
prepared by the department and adopted by Augusta-Richmond County pursuant to
the requirements of this chapter.
I
(21) Sanitary sewer system. The complete sanitary sewer
system of the county which discharges sewage directly or indirectly into the
sewage treatment plant, including sanitary sewer pipelines, manholes and
flushing inlets and appurtenances to the foregoing, excluding sewage treatment
facilities.
I
(22) Site. Any lot, plot, parcel or tract of land.
"
I
(23) Storm water management. The collection, conveyance,
storage, treatment and disposal of storm water runoff in a manner to meet the
objectives of this chapter and which shall include a'system of vegetative or
structural measures, or both, that control the increased volume and rate of
storm water runoff and water quality impacts caused by manmade changes to the
land.
I
(24) Storm water management facilities. Constructed or
natural components of a storm water drainage system, designed to perform a
particular function, or multiple functions, including, but not limited to,
pipes, swales, ditches, culverts, street gutters, detention basins, retention
basins, constructed wetlands, infiltration devices, catch basins, oil/water
separators, sediment basins, natural systems and modular pavement.
I
I
(25) Storm water runoff. The direct response of a land
surface to precipitation and includes the surface and subsurface runoff that
enters a ditch, stream, storm drain o~ other concentrated flow during and
following the precipitation.
I
(26) Variance. The modification of the minimum storm water
management requirements for specific circumstances where strict adherence of
the requirements would result in unnecessary hardship and not fulfill the
intent of this chapter.
I
I
(27) Water quality. Those characteristics of storm water
runoff that relate to the physical, chemical, biological, or radiological
integrity of water.
I
(28) Water quantity. Those characteristics of storm water
runoff that relate to the rate and volume of the storm water runoff.
~
5-1-5.
SCOPE OF RESPONSIBILITY.
I
(a) The provis~ons of this chapter shall apply throughout
Augusta-Richmond County.
(b) The director of the department of public works or designee
shall be responsible for the coordination and enforcement of the provisions of
this chapter. \
I
I
(c) The department of public works shall be responsible for the
conservation, management, maintenance, extension, and improvement of the
Augusta-Richmond County storm water system, including activities necessary to
control storm water runoff and activities necessary to carry out storm water
management programs included in Augusta-Richmond County's NPDES storm water
permit.
I
(d) The application of this chapter and the provisions expressed
I
I
I
I
herein shall be the minimum storm water management requirements and shall not
be deemed a limitation or repeal of any other powers granted by State statute.
In addition, if site characteristics indicate that complying with these
minimum requirements will not provide adequate designs or protection for local
property or residents, it is the designer's responsibility to exceed the
minimum requirements as necessary.
I
~
5-1-6.
POWERS OF THE DEPARTMENT OF PUBLIC WORKS.
I
, .
(a) The department of public works shall have the power to
administer and enforce all regulations and procedures adopted to implement
this chapter, including the right to maintain an action or procedure in any
court of competent jurisdiction to compel compliance with or to restrain any
violation of this chapter.
I
(b)
The department of public works shall:
I
(1) Administer, coordinate and oversee acquisition,
design, construction, and operation and maintenance of municipal storm water
facilities and conveyances;
I
(2) Establish or oversee establishment of development
standards and guidelines for controlling storm water runoff,
(3 ).
should be operated;
Determine the manner in which storm water facilities
I
(4) Inspect private systems which discharge to the
Richmond County's storm water system;
I
(5) Advise the Augusta-Richmond County Commission and
other Augusta-Richmond County departments on issues related to storm water;
I
(6) Protect facili~ies and properties controlled by the
Department of Public Works and prescribe how they are used by others;
(7) Require new, increased, or significantly changed storm
water contributions to comply with the terms of this chapter.
I
(8) Develop programs or procedures to control the
discharge of pollutants into the municipal storm sewer system; and,
I
(9) Adopt and implement the storm water management program
for Augusta-Richmond County.
~
5-1-7.
STORM WATER RUNOFF QUANTITY CONTROLS.
I.
(a) Water quantity controls will be provided as a part of all
development pursuant to the provisions of the Augusta-Richmond County Soil
Erosion and Sediment Control Ordinance, Zoning Ordinance, Water and Wastewater
Disposal Ordinance, and Subdivision of Land Ordinance, and regulations adopted
pursuant to those ordinances.
I
I
(b) Augusta-Richmond County may allow storm water runoff that
otherwise is of unacceptable quantity or which would be discharged in volumes
or at rates in excess of those otherwise allowed by its ordinances and
regulations to be discharged into drainage facilities off site of the
development, provided the following conditions are met:
I
(1) It is not practicable to completely manage runoff on-
site in a manner that meets the design and performance standards found in the
ordinances and regulations.
I
(2) Off-site drainage facilities and channels leading to
them are designed, constructed and maintained in accordance with requirements
I
I
I
of those ordinances; and,
I
(3) Adequate provision is made for sharing of
construction, maintenance and operating costs of facilities.
I
s
5-1-8.
PROHIBITION.
I
(a) It is unlawful for any person to throw, drain, run, or
otherwise discharge to any component of the municipal separate storm water
system or to cause, permit or suffer to be thrown, drained, run, or allow to
seep or otherwise discharge into such system all matter of any nature
excepting only such storm or surface water as herein authorized.
I
(b) The director may require controls for or exempt from the
prohibition provision above the following, provided he/she determines they are
not a significant source of pollution:
I
(1) Unpolluted industrial cooling water, but only under
the authorization and direction of the director and appropriate NPDES permit.
(Per State requirements, the discharge should not raise the temperature of the
receiving stream more than five (5) degrees after the discharge has thoroughly
mixed with receiving waters. In secondary trout streams, there shall be no
elevation in temperature exceeding two (2) degrees above the natural stream
temperature)
I
I.
(2) Water line flushing performed by a government agency,
diverted stream flows, rising ground waters, and unpolluted ground water
infiltration.
(3) Unpolluted pumped ground water.
I
(4) Discharges from potable water sources, foundation
drains, air conditioning condensation, irrigation water springs, water from
crawl space pumps, footing drains, lawn watering, individual residential car
washing, flows from riparian habitats and wetlands, and street wash water.
I
(5) Discharges or flows from fire fighting.
I
(6) Other unpolluted water.
I
(c) In the event of an accidental discharge or an unavoidable
loss to the municipal storm sewer system of any material or substance other
than storm water runoff, the person concerned shall inform the department of
public works within twenty-four (24) hours of the nature, quantity and time of
occurrence of the discharge. The person concerned shall take immediate steps
to contain the waste, treat the waste or other actions to minimize affects of
the discharge on the municipal system and receiving streams. The person shall
also take immediate steps to ensure no recurrence of the discharge.
I
s
5-1-9.
ILLICIT CONNECTIONS.
I
(a) It is unlawful for any person, to connect any pipe, open
channel, or any other conveyance system that discharges anything except storm
water or unpolluted water which is approved by the director, based on the
exemptions listed in s 5-1-8(b), to Augusta-Richmond County's storm water
system.
I
1
(b) Improper connections in violation of this Code must be
disconnected and redirected, if necessary, to the Augusta-Richmond County
sanitary sewer system upon approval by the director of the water and sewer
department.
I
s
5-1-10.
MAINTENANCE AND INSPECTION.
(a)
Any storm water management facility or BMP which services a
I
I
I
single lot or commercial and industrial development shall be privately owned
and maintained. The owner shall maintain a perpetual, nonexclusive easement
which allows for access for maintenance.
I
(b) All other storm water management control facilities and BMPs
shall be publicly owned and/or maintained only if accepted for maintenance by
Augusta-Richmond County.
I
(c) The director may require dedication of privately owned storm
water facilities which discharge to the storm water system to Augusta-Richmond
County.
I
(d) The department of public works director shall determine
inspection schedules necessary to enforce the provisions of this chapter.
I
(e) The director or designee, bearing proper credentials and
identification shall be permitted to enter, without hindrance, all properties
for regular inspections, periodic investigations, observation; measurement,
enforcement, sampling and testing, in accordance with provisions of this
chapter. The director or designee shall duly notify the owner of said
property or the representative on site, except in the case of an emergency.
I
I
(f) The director or designated employee of the department of
public works, bearing proper credentials and identification, shall be
permitted to enter, without hindrance, all properties for which Augusta-
Richmond County holds a negotiated easement for repairs, maintenance and other
purposes related to any portion of the storm water management facilities lying
within said easement. The director or designee shall duly notify the owner of
said property or the representative on site, except in the case of an
emergency.
I
I
(g) Measurements, tests and analyses performed by the department
of public works or required of any discharger to the municipal system shall be
in accordance with 40 CFR Part 136, un;ess another method is approved by the
director.
I
(h) If, after inspection, the condition of a facility presents
any immediate danger to the public health, safety or general welfare because
of unsafe conditions or improper maintenance, Augusta-Richmond County shall
have the right, but not the duty, to take action as may be necessary to
proeect the public and make the facility safe.
I
I
(i) Inspection reports shall be maintained in a permanent file
located at the department of public works office for a period of three (3)
years. All such records shall be open to the public.
I
5
5-1-11.
VARIANCES FOR REQUIREMENTS.
I
(a) The director may grant a variance from requirements of this
chapter if exceptional circumstances applicable to a site exist such that
strict adherence to the provisions of this chapter will result in unnecessary
hardship and will not fulfill the intent of this chapter.
I
(b) A written request for a variance shall be required and shall
state the specific variance sought and the reasons, with supporting data, a
variance should be granted. The request shall include all information
necessary to evaluate the proposed variance.
I
(c) The director will conduct a review of the request for a
variance within thirty (30) working days of receiving the request.
5
5-1-12.
APPEALS.
I
(a) Any person aggrieved by a decision of the director
(including any decision with reference to the granting or denial of a variance
I
I
I
/
I
from the terms of this chapter) may appeal same by filing a written notice of
appeal with the director within ten (10) days of the issuance of said decision
by the director. A notice of appeal shall state the specific reasons why the
decision of the director is alleged to be in error.
I
(b) The director may reverse his/her decision giving written
reason for reversal. In the event the director does not reverse his/her
decision, the director shall prepare and send to the board. of appeals and
appellant a 'written response to said notice of ~ppeal within thirty (30) days
of receipt of the notice of appeal.
I
(c) All appeals shall be heard by a board of appeals to be
constituted of the county administrator, the director of inspections, and the
Director of the Augusta-Richmond County Planning and Zoning Commission. The
hearing shall be held within thirty (30) days after receipt of notice of
appeal or on a date mutually agreed upon in writing by the appellant and the
board of appeals.. The board of appeals shall then make its finding within ten
(10) days of the appeal hearing. Decisions of the board of appeals shall be
based upon guidelines for appeals established by the Augusta-Richmond County
Commission as amended from time to time.
I
I
I
(d) If the appellant is dissatisfied with the decision of the
board of appeals, he/she can appeal said decision to the Augusta-Richmond
County Commission within thirty (30) days of the hearing decision being
rendered to appellant. The Commission shall notify appellant of a time and
place for hearing the appeal, and said time shall be within thirty (30) days
of receipt of notice from appellant. The Commission shall make a finding on
the appeal within terr (10) days of the hearing.
I
I
(e) If the appellant is dissatisfied with the Commission's
decision, he/she can appeal said decision to the Superior Court of Richmond
County within thirty (30) days of the date of that decision. Said appeal
shall consist of a review of the record in the appeal process.
I
~
5-1-13.
COOPERATION WITH OTHER GOVERNMENTS.
I
Augusta-Richmond County may enter into agreements with the State
of Georgia or with other local governments to carry out the purpose of this
chapter. These agreements may include, but are not limited to enforcement of
provisions, resolution of disputes, cooperative monitoring, and cooperative
management of storm water system and management programs.
I
~
5-1-14.
PROPERTY OWNER LIABILITY; SUPPLEMENTAL CHARGES.
I
Any person in violation of any portion of this chapter shall pay
for all costs of Augusta-Richmond County associated with the violation,
including (but not limited to) containment, cleanup, injury, death, legal, or
other costs.
~
5-1-15.
ENFORCEMENT; PENALTIES.
I
(a) This chapter shall be enforced by the office of the
director of public works. Citations for violation may be issued by inspectors
from the department of public works. Citation shall specify the nature of
violation and the potential penalty involved.
I
(b) Any person, cited for violating this chapter shall be tried
as a misdemeanor and shall upon conviction, shall be subject to the penalties
provided in ~ 1-6-1.
(c) In addition, Augusta-Richmond County may institute
appropriate action or proceedings at law or in equity for the enforcement of
this chapter or to correct violations of this chapter. Any court of competent
jurisdiction may have the right to issue restraining orders, temporary or
permanent injunctions, and other appropriate forms of remedy or relief. Each
I
I
I
I
I
I
!
day of noncompliance is considered a separate offense. Nothing herein
contained shall prevent Augusta-Richmond County from taking such other lawful
action as is necessary to prevent or remedy any violation, including
application for injunctive relief.
I
I
5
5-1-16.
SEVERABILITY.
I
If any term, requirement or provision of this chapter or the
application thereof to any person or circumstance shall, to any extent, be
invalid or unenforceable, the remainder of this chapter or the application of
such terms, requirements and provisions to persons or circumstances other than
those to which it is held invalid or unenforceable, shall not be affected
thereby and each term, requirement or provision of this chapter shall be valid
and be enforced to the fullest extent permitted by law.
I
5
5-1-17.
PRIOR INCONSISTENT ORDINANCES.
I
Any provisions and ordinances adopted prior to the date of
adoption of this chapter and that are inconsistent with this chapter. are
hereby voided, but only to the extent of such inconsistency.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
INDEMNITY
WHEREAS,
has submi t ted a si te plan to Richmond Coun ty, Georgia, for
proposed construction and/or development; and
WHEREAS, a retention basin or retention pond is
required for the site plan; and
WHEREAS,
does no t des ire to erect a fence around the retention bas i n
or retention pond.
NOW, THEREFORE, in consideration of Richmond
County, Georgia not requiring a fence to be constructed
around the aforementioned site plan,
shall indemnify and save harmless Richmond County,
Georgia, the Board of Commissioners of Richmond County,
Georgia, and the employees of Richmond County, Georgia,
against any and all damages to property or injuries to or
dea th of any person or persons, and shall defend, indemni fy
. and save harIU.less Richmond County, Georgia, the -Board -of-
Commissioners of Richmond County, Georgia, and the employees
of Richmond County, Georgia, from any and all claims,
demands, suits, actions or proceedings of any kind or nature,
of or by anyone whomsoever, in any way resulting from or
arising out of' Richmond County, Georgia, approving a 3i te
plan su bmi t ted by , for
-
dated , 19___, without a fence around the
,
retention basin or retention pond on the site plan.
This day of , 19
SIGNED, SEALED AND DELIVERED
in the presence of:
NOTARY PUBLIC, RICHMOND CO.,
r.~mu~ T 4
I
FLOOD DAMAGE PREVENTION ORDINANCE
I
RICHMOND COUNTY, GEORGIA
191-19
ARTICLB 1.
STATUTORY AUTHORIZATION. FINDINGS OF FACT. PURPOSE AND
I
OBJECTIVES.
IRCTIOH A. STATUTORY AUTHORIZATIO~
The Legislature of the State of Georgia has, in Articl~ IX, Section II,
Paragraph IV of the Constitution of the State of Georgia, delegated the
responsibility to local governmental units to adopt regulations designed
to promote the public health, safety and general welfare of its citizenry.
Therefore, the Richmond County Board of Commissioners does ordain as
I
I
I
follows:
I
SECTION B. FINDINGS OF FACT.
I
(1) The flood hazard areas of the unincorporated Richmond County are
subject to periodic inundation which results in loss of life and
property, health and safety hazards, disruption of commerce and
governmental services, extraordinary public expenditures for flood
protection and relief, and impairment of the tax base, all of which
adversely affect the public health, safety, and general welfare.
(2) These flood losses are caused by the cumulative effect of obstruc-
tions in floodplains causing increases in flood heights and veloci-
ties, and by the occupancy in flood hazard areas by uses vulnerable
to floods or hazardous to other lands which are inadequately
elevated, floodproofed, or otherwise unprotected from flood damages.
I
I
I
I
SECTION C. STATEMENT OF PURPOSE.
It is the purpose of this Ordinance to promote the public health, safety
and general welfare and to minimize public losses due to flood conditions
in specific areas by provisions designed to:
(1) restrict or prohibit uses which are dangerous to health, safety and
property due to water or erosion hazards, or which result in damaging
I
I
I
increases in erosion or/in flood heights or velocities;
I
(2) require that uses vulnerable to floods, including facilities which
serve such uses, be protected against flood damage at the time of
initial construction;
(3) control the alteration of natural floodplains, stream channels, and
natural protective barriers which are involved in the accommodation
I
I
of flood waters;
I
(4) control filling, grading, dredging and other development which may
increase erosion or flood damage; and,
.1
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
(5) prevent or regulate the construction of flood barriers which will
unnaturally divert flood waters or which may increase flood hazards
to other lands.
8RCTIO. D. OBJECTIVES.I.
(1) to protect human life and health;
(2) to minimize expenditure of public money for costly flood control
projects;
(3)' to mini.ize the need for rescue and relief efforts
flooding and generally undertaken at the expense
public;
to minimize prolonged business interruption;
to minimize damage to public facilities and utilities such as water
and gas mains, electric, telephone and sewer lines, streets and
bridges located in floodplains;
(6) to help naintain a stable tax base by providing for the sound use and
development of flood prone areas in such a manner as to minimize
flood blight areas; and,.
(7) to insure that potential home buyers are notified that property is in
a flood area.
associated with
of the general
(4)
(5)
ARTICLB 2. DEFINITIONS.
Unless specifically defined below, words or phases used in this Ordinance
shall be interpreted so as to give them the meaning they have in common
usages and to give this Ordinance its most reasonable application.
"ADDITION (TO AN EXISTING BUILDING)" means any walled and roofed expansion
to the perimeter of a bUilding in which the addition is connected by a
common loadbearing wall other than a fire wall. Any walled and roofed
addition which is connected by a fire wall or is separated by independent
perimeter loadbearing walls is new construction.
"APPEAL" means a request for a review of the Executive Director's inter-
pretation of any provision of this Ordinance or a request for a variance.
"AREA OF SHALLOW FLOODING" means a designated AO or .VO Zone on a
community'S Flood Insurance Rate Map (FIRM) with base flood depths from
one to three feet where a clearly defined channel does not exist, where
the path of flooding is unpredictable and indeterminate, and where velo-
city flow may be evident.
"AREA OF SPECIAL FLOOD HAZARD" is the land in the floodplain within a
community subject to a one percent or greater chance of flooding in any
given year. The area of the .peglal floOd hazard .hall consist ot the
floodway, the lower tloodway fringe, and the upper floodway fringe.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
, I
-FLOOD INSURANCE RATE MAP lFIRM}- means an official map of a community, on
which Federal Emergency Management Agency has delineated both the areas of
special flood hazard and the risk premium zones applicable to the
community.
-FLOOD INSURANCE STUDY- is the official report provided by the Federal
Emergency Management Agency. The report contains flood profiles, as well
as the Flood Boundary Floodway Map and the water surface elevation of the
base flood.
-FLOODWAY" means the channel of a river or other watercourse and the
adjacent land areas that must be reserved in order to discharge the base
flood without cumulatively increasing the water elevation more than one
foot.
-FLOODWAY FRINGE. LOWER" means the portion of the area of special flood
hazard that is located between the limit of the floodway and a line
connecting all points half the distance between the floodway and the limit
of the area of special flood hazard.
"FLOODWAY FRINGE. UPPER" means the portion of the area of special flood
hazard that is located between the lower floodway fringe and the boundary
of the area of special flood hazard.
"FLOOR" means the top surface of an enclosed area in a building (including
basement), i.e., top of slab in concrete slab construction or top or wood
flooring in wood frame construction. The term does not include the floor
of a garage used solely for parking vehicles.
"FUNCTIONALLY DEPENDENT FACILITY" means a facility which cannot be used
for its intended purpose unless it is located or carried out in close
proximity to water, such.as a docking or port facility necessary for the
loading and unloading of cargo or passengers, shipbuilding, ship repair,
or seafood processing facilities. The term does not include long-term
storage, manUfacturing, sales, or service facilities.
"HIGHEST ADJACENT GRADE" means the highest natural elev~tion of the ground
surface, prior to construction, next to the proposed walls of a structure.
"HISTORIC STRUCTURE" means any structure that is (a) listed individually
in the National Register of Historic Places (a listing maintained by the
Department ot Interior) or preliminarily determined by the secretary of
the Interior as meeting the requirements tor individual listing on the
National Register; (b) Certified or preliminarily determined by the
Secretary of the Interior as contributing to the historical significance
of a registered historic district or a district preliminarily determined
by the Secretary to qualify as a registered historic district; (c)
Individually listed on a state inventory ot historic places in states with
historic preservation programs which have been approved by the Secretary
I
9f the Interior; or (d) Individually listed on a local inventory of
historic places in communities with historic preservation programs that
bave been certified either: (1) by an approved state program as determined
, " l
by the Secretary ot the Interior; or (2) directly by the Secretary of the
Interior in states without approved programs.
"MANUFACTURED HOME" means a structure, transportable in one or more
sections, which is built on a permanent cha~sis and designed to be used
with or without a permanent foundation when connected to the required
utilities. The term also includes park trailers, travel trailers, and
si.ilar transportable structures placed on a site for. 180 consecutive days
or longer and intended to be improved property.
"MEAN SEA LEVEL" means the average height of the sea for all stages of the
tide. It is used as a reference for establishing various elevations with-
in the floodplain. For purpose of this Ordinance, the term is synonymous
with National Geodetic Vertical Datum (NGVD).
"NATIONAL GEODETIC VERTICAL DATUM (NGVD}" as corrected in 1929 is a
I
I
I
I
I
I
I
vertical control used as a reference for establishing varying elevations
I
within the flood plain.
I
"NEW CONSTRUCTION" means structures for which the "start of constructionN
commenced on or after the effective date of this Ordinance.
"NEW MANUFACTURED HOME PARK OR SUBDIVISION"
means a manufactured
home
I
-
park or subdivision for which the construction of facilities for servicing
I
the lots on which the manufactured homes are to be affixed (including at a
minimum, the installation of utilities, the construction of streets, and
either final site grading or the pouring of concrete pads) is completed on
I
or after the effective date of floodplain management regulations adopted
by a community.
NSTART OF CONSTRUCTION" (for other than new construction or substantial
I
improvements under the Coastal Barrier Resources Act (P.L. 97-348)),
includes substantial improvement, and means the date the -building permit
was issued, provided the actual start of construction, repair, reconstruc-
I
tion, or improvement was within 180 days of the permit date.
The actual
I
start means the first placement of permanent construction of a structure
I
(inclUding a manufactured home) on a site, such as the pouring of slabs
for footings, installation of piles, construc~ion of columns, or any work
beyond the stage of excavation or the placement of a manufactured home on
a foundation. Permanent construction does not include the installation of
streets and/or walkways; nor does it include excavation for a basement,
footings, piers, or found~tions or the erection of temporary forms I nor
I
I
I
I
I
I
I
I
I~
I
I
I
I
I
I
I
I
I
I
I
I
doe. it include the installation on the property of accessory buildinqs,
such a. garaqes or sheds not occupied as dwellinq units or not part of the
.ain structure.
· STRUCTURE " means a walled' ~nd roofed buildinq tfiat 1s principally above
ground, a manufactured home, a gas or liquid storaqe tank, other man-made
facilities or infrastructures.
.SUBSTANTIAL DAMAGE" means damaqe of any oriqin sustained by a structure
whereby the cost of restorinq the structure to its before damaged
condition would equal or exceed 50 percent of the market value of the
structure before the damage occurred.
· SUBSTANTIAL IMPROVEMENT" means any combination of repairs,
reconstruc-tion, alteration, or improvements to a structure, taking place
during the life of a structure (a five (5) year period), in ~hich the
cumulative cost equals or exceeds fifty percent of the market value of the
structure. The market value of the structure should be (1) the appraised
value of the structure prior to the start of the initial repair or
improvement, or (2) in the case of damage, the value of the structure
prior to the damage occurring. For the purpose of this definition,
"substantial improvement" is considered to occur when the first alteration
of any wall, ceilinq, floor, or other structural part of the building
commences, whether or not that alteration affects the external dimensions
of the structure. The term does not, however, include any project for
improvement of a structure required to comply with existing health,
sanitary, or safety code specifications which are solely necessary to
assure safe living conditions.
"SUBSTANTIALLY IMPROVED EXISTING MANUFACTURED HOME PARKS OR SUBDIVISIONS"
is where the repair, reconstruction, rehabilitation or improvement of the
streets, utilities and pads equals or exceeds 50 percent of the value of
the streets, utilities and pads before the repair, reconstruction or
improvement commenced.
.VARIANCE" is a grant of relief from the requirements of this Ordinance
which permits construction in a manner otherwise prohibited by this
Ordinance where specific enforcement would result in unnecessary
hardship~
I
"'tICL. 3. GmrBRAL PROVISIONS
SBCifIOH &. LANDS TO WHICH THIS ORDINANCE APPLIES.
This Ordinance shall apply to all areas of special flood hazard within the
jurisdiction of the Board of commissioners.
8BCifIOH B. BASIS FOR ESTABLISHING THE AREAS OF SPECIAL FLOOD HAZARD.
The areas of special flood hazard identified by the Federal Emergency
Management Agency in its Flood Insurance study, dated February 15, 1978,
with accompanying maps and other supporting data, and any revision there-
to, are adopted by reference and declared to be a part of this Ordinance.
SECTIOR c. ESTABLISHMENT OF DEVELOPMENT PERMIT.
A Development .permit shall be required in conformance with the
of this Ordinance prior to the commencement of any
activities.
SECTIOR D. COMPLIANCE.
provisions
development
I
I.
I
I
I
I
I
No structure or land shall hereafter be located, extended, converted, or
structurally altered without full compliance with the terms of this
Ordinance and other applicable regulations.
SECTIOR B. ABROGATION AND GREATER RESTRICTIONS.
This Ordinance is not intended to repeal, abrogate, or impair any existing
easements, covenants, or deed restrictions. However, where this Ordinance
and another conflict or overlap, whichever imposes the more stringent
restrictions shall prevail.
I
I
I
SEC'UOH -r. INTERPRETATION.
In the interpretation and application of this Ordinance all provisions
shall be: (1) considered as minimum requirements; (2) liberally construed
in favor of the governing body; and (3) deemed neither to limit nor repeal
any other powers granted under state statutes.
I
I
I
SECTION G. WARNING AND DISCLAIMER OF LIABILITY.
I
The degree of flood protection required by this Ordinance is considered
reasonable for regulatory purposes and is based on scientific and engi-
neering consideration. Larger. floods can and will occur on rare
I
occasions. Flood heights may be increased.by man-made or natural causes.
This Ordinance does not imply that land outside the area of special flood
hazard or uses permitted within such areas will be free from flooding or
flood damages. This Ordinance shall not create liability on the part of
l
the Board of Commissioners or by any officer or employee thereof for any
flood damages that result from reliance on this Ordinance or any admini-
strative decision lawfully made thereunder.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
..~IO. B. ENFORCEMENT AND PENALTIES FOR VIOLATION. (REVISED 7/26/91)
. Viol~tion of the provisions of this Ordinance or failure to comply with
any of its requirements, including violation of conditions and safeguards
established in connection with grants of variance or special exceptions,
shall be reported to the County Engineer. Once a violation is evident,
the County Engineer,acting on behalf of the Board of Commissioners, shall
be empowered to notify the owner in writing of the apparent violation of
this ordinance. The written notice shall direct the owner to cease the
development activity until such time as the requirements and procedures of
this Ordinance have been met. Upon failure of the owner to comply with
this notice, the County Engineer shall notify the County attorney of the
violation and the County Attorney shall immediately begin legal procedures
in the Superior Court of Richmond County to prevent, enjoin, abate, or
remove such violations in addition to injunction relief. All persons,
firms or corporations failing to comply with the mandatory provisions
hereof or doing any act prohibited hereby shall be guilty of an offense
and, upon conviction in the Magistrate Court of Richmond County, Georgia,
shall be punished by a fine in an amount not to exceed One Thousand
( Dollars ($1,000) and/or imprisonment in the County jail for a period not
in excess of sixty (60) days. Each day such violation continues shall be
considered a separate offense. Nothing herein contained shall prevent the
Board of Commissioners from taking such other lawful action as is
necessary to prevent or remedy any violation.
I,
ARTICLE 4. ADMINISTRATION.
SECTION A. DESIGNATION OF THE EXECUTIVE DIRECTOR.
The Executive Director of the Augusta-Richmond County Planning commission
is hereby appointed to administer and impleme~t the provisions of this
Ordinance.
SECTION B. PERMIT PROCEDURES.
Application for a Development Permit shall be made to the Executive
Director on forms furnished by him or her prior to any development activi-
ties, and may include, but not be limited to, the following plans in
duplicate drawn to scale showing the nature, location, dimensions, and
elevations of the area in question; existing or proposes structures, fill,
storage of materials, drainage facilities, and the location of the fore-
going. Specifically, the following information is required:
(1) Application stage.
(a) Elevation in r.elation to mean sea level of the proposed lowest
floor (including basement) of all structures;
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
(b) Elevation in relation to mean sea level to which any non-
residential structure will be flood-proofed;
(c) certificate from a registered professional engineer or
architect that the\non-residential flood-proofed structure will
meet the flood-proofing criteria in Article 5, section B (2);
(d) Description of the extent to which any watercourse will be
altered or relocated as a result of proposed development; and,
(2) Construction Stage.
Provide a floor elevation or flood-proofing certification after the
lowest floor is completed. Upon placement of the lowest floor, or
flood-proofing by whatever construction means, or upon placement of
the horizontal structural members of the lowest floor, whichever is
applicable, it shall be the duty of the permit holder to submit to
the Executive Director a certification of the elevation of the lowest
floor, flood-proofed elevation, or the elevation of the lowest por-
tion of the horizontal structural members of the lowest floor, which-
ever is applicable, as built, in relation to mean sea level. Said
certification shall be prepared by or under the direct supervision of
a registered land surveyor or professional engineer and certified by
same. When flood-proofing is utilized for a particular building,
said certification shall be prepared by or under the direct super-
vision of a professional engineer or architect and certified by same.
Any work undertaken prior to submission of the certification shall be
at the permit holder's risk. The Executive Director shall review the
floor elevation survey data submitted. Deficiencies detected by such
review shall be corrected by the permit holder immediately and prior
to further progressive work being permitted to proceed. Failure to
submit the surveyor failure to make said corrections required here-
by, shall be cause to issue a stop-work order for the project.
SECTION C. DUTIES AND RESPONSIBILITIES OF THE EXECUTIV& DIRECTOR.
Duties of the Executive Director shall include, but not be limited to:
(1) Review all development permits to assure that the permit requirements
of this Ordinance have been satisfied.
(2) Advise permittee that additional federal or state permits may be
required and if specific federal or state permit requirements are
known, require that copies of such permits be provided and maintained
on file with the development permit.
(3) Notify adjacent communities and the Georgia Department of Natural
Resources prior to any alteration or relocation of a watercourse, and
submit evidence of such notification to the Federal Emergency
U~"~~AmAnt Aaencv.
I
(4) Assure that aaintenance is provided within the altered or relocated
portion of said watercourse so that flood-carrying capacity is not
diminished.
I
I
(5) Verify and record the actual elevation (in relation to mean sea
level) of the lowest floor (including basement) of all new or
substantially improved structures, in accordance with Article 4,
section B (1).
(6) Verify and record the actual elevation in relation to mean sea level
to which the new or substantially improved structures have been
flood-proofed, in accordance with Article 4, Section B (2).
(7) When flood-proofing is utilized for a particular structure, the
Executive Director shall obtain certification from a registered pro-'
fessional engineer or architect, in accordance with Article 5,
I
I
I
I
Section B (2).
I
(8) Where interpretation is needed as to the exact location of boundaries
of the areas of special flood hazard (for example, where there
appears to be a conflict between a mapped boundary and actual field
conditions) the Executive Director shall make the necessary interpre-
tations. The person contesting the location of the boundary shall be
given a reasonable opportunity to appeal the interpretation as
provided in this article.
(9) When base flood elevation data or floodway data have not been
provided in accordance with Article 3, Section B, then the Executive
Director shall obtain, review and reasonably utilize any base flood
elevation and floodway data available from a federal, state or other
I
I
I
I
I
source, in order to administer the provisions of Article 5.
I
(10) All records pertaining to the provisions of this Ordinance shall be
maintained in the office of the Executive Director and shall be open
I
for public inspection.
8ECTION D. VARIANCE PROCEDURES.
(1) The Zoning Board of Appeals as established by the Board
of
I
commissioners shall hear and decide appeals and request for variances
from the requirements of this Ordinance.
(2) The zoning Board of Appeals shall hear and decide appeals when it is
alleged there is an error in any requirement, decision or determina-
tion made by the Executive Director in the enforcement or administra-
tion of this Ordinance.
(3) Any person aggrieved by the decision of the Zoning Board ot Appeals
or any taxpayer may appeal such decision'to the superior Court of
.
.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Richmond County, as provided 1n Title 5, Chapter 3, of the Code of
. Georgia, however, all appeals shall be on the. record and shall not be
de novo.
(4) Variances may be issued for the reconstruction, rehabilitation or
restoration of structures listed on the National Register of Historic
Places or the state Inventory of Historic Places without regard to
the procedures set forth in the remain4er of this section, except for
Article 4, section d (8)(a) and (d), and provided the proposed re-
construction, rehabilitation or restoration will not result in the
structure losing its historical designation.
(5) In passing upon such applications, the zoning Board of Appeals shall
consider all technical evaluations, all relevant factors, all
standards specified in other sections of this ordinance; and,
(a) the danger that materials may be swept onto other lands to the
injury of others;
(b) the danger to life and property due to flooding or erosion
damage;
(c) the susceptibility of the proposed facility and its contents to
flood damage and the effect of such damage on the individual
owner;
(d) the importance of the services provided by the proposed
facility to the community;
(e) the necessity of the facility to a waterfront location, in the
case of functionally dependent facility;
(f) the availability of alternative locations, not subject to
flooding or erosion damage, for the proposed use;
(g) the compatibility of the proposed use with existing and antici-
pated development;
(h) the relationship of the proposed use to the comprehensive plan
and floodplain management program for that area;
(i) the safety of access to the property in times of flood for
ordinary and emergency vehicles;
(j) the expected heights, velocity, duration, rate of rise and
sediment transport of' flood waters and the effects of wave
action, if applicable, expected at the site; and
(k) the costs of providing governmental services during and after
flood conditions inCluding maintenance and repair of public
utilities and facilities such as sewer, gas, electrical, and
water systems, and streets and bridges.
I
I
(6) Upon consideration of the factors listed above, and the purpose of
this ordinance, the Zoning Board of Appeals may attach such condi-
tions to the granting of. variances as it deems necessary to further
the purposes of this Ordinance.
(7) Variances shall not be issued within any designated floodway or lower
floodway tringe it any increase in flood levels auring the base flood
discharge would result.
(8) Conditions for Variances:
(a) Variances shall only be issued upon a determination that the
variance is the minimum necessary, considering the flood hazard,
to afford relief; and in the instances of a historical building,
a determination that the variance is the minimum necessary so as
not to destroy the historic character and des~gn of the
building;
(b) variances shall only be issued upon (i) a showing of good and
sufficient cause, (ii) a determination that failure to grant the
variance would result in exceptional hardship, and (iii) a
determination that the granting of a variance will not result in
increased flood heights, additional threats to public safety,
extraordinary public expense, create nuisance, cause fraud on or
victimization of the public, or conflict with existing local
laws or ordinance.
I
I
I
I
I
I
I
I
I
(c) Any applicant to whom a variance is granted shall be given
written notice specifying the difference between the base flood
elevation and the elevation to which the structure is to be
built and stating that the cost of flood insurance will be
commensurate with the increased risk resulting from the reduced
lowest flood elevation.
Cd) The Executive Director shall maintain the records of all appeal
actions and report any variances to the Federal Emergency
Management Agency upon request.
I
I
I
I
I
ARTICLB 5. PROVISIONS FOR FLOOD HAZARD REDUCTION.
SBCTIOH A. GENERAL STANDARDS.
In all areas of special flood hazard the following provisions are
required:
(1) New construction and substantial improvements shall be anchored to
prevent flotation, collapse, or lateral movement of the structure;
I
I
I
I
I
I
I
I
I
I
I
I
I
I
'I
I
I
I
I
I
I
I
(a) Prohibit encroachments, including fill, new construction, sub-
stantial improvements and other developments unless certifica-
tion (with supporting technical data) by a registered
professional engineer is provided demonstrating that encroach-
ments shall not result in any increase in flood levels during
occurrence of base fiood discharge.
(b) If Article 5, Section B (5) (a) is satisfied, all ~ew construc-
tion and substantial improvements shall comply with all
applicable flood hazard reduction provisions of Article 5.
(c) Prohibit the placement of manufactured homes (mobile homes),
except in an existing manufactured homes (mobile homes) park or
subdivision. A replacement manufactured home may be placed on a
lot in an existing manufactured home park or subdivision
provided the anchoring standards of Article 5, section A (2) are
meti and the elevation standards of Article 5, Section B(l) and
the encroachment standards of Articel 5, section 8(5) (a) are
met.
(6) Floodwav Frinqes. Lower. The lower floodway fringe is the area
between the floodway and the upper floodway fringe that is lower than
a line one-half the distance between the floodway and the boundary of
the area of special food hazard. The lower floodway fringe is a
transitional area that is hazardous due to its proximity to the
floodway and encroachment by fill or development within this area
could have serious impact on the entire floodplain. The following
provisions shall apply within the lower floodway fringe:
(a) Prohibit encroachments, including fill, new construction, sub-
stantial improvements and other developments unless certifica-
tion by a registered professional engineer is provided demon-
strating that encroachments shall not result in any increase in
flood levels during occurrence of base flood discharge;
(b) If Article'S, section 8 (6) (a) is satisfied, all new construc-
tion and substantial improvements shall comply with all
applicable flood hazard reduction provisions of Article 5.
(c) Prohibit the placement of manufactured homes (mobile homes),
except in an existing manufactured homes (mobile homes) park or
subdivision. A replacement manufactured home may be placed on a
lot in an existing manufactured home park or subdivision
provided the anchoring standards of Article 5, Section A (2) are
meti and the elevation standards of Article 5, Section 8(1) and
the encroachment~tandards of Article 5, Section 8(5)(a) are
met.
I
I
(7) Larae Tracts. It a tract contains over one (1) acre located within
the area ot special flood hazard, then development or land distur-
bance on that portion of the tract located within the special flood
hazard area shall comply with the standards for lower floodway
fringes set forth in Article 5, section B (6).
I
(8)
other Areas Unsuitable For Develocment.
Land
subject
to
flooding
I
that is not located within a mapped area of special flood hazard may,
at the discretion of the Executive Director or the County Engineer,
be required to comply with any or all standards set forth in this
I
Ordinance.
I
SECTION C. STANDARDS FOR STREAMS WITHOUT ESTABLISHED BASE FLOOD
ELEVATIONS AND/OR FLOODWAYS.
Located within the areas of special flood hazard established in Article 3,
Section B, where small streams exist but where no base flood data have
been provided or where no floodways have been provided, the following
provisions apply:
(1) No encroachments, including fill material or structures shall be
located within a distance of the stream bank equal to five times the
width of the stream at the top of the bank or twenty feet each side
I
I
I
I
from top of the bank, whichever is greater, unless certification by a
registered professional engineer is provided demonstrating that su~h
I
encroachments shall not result in any increase in flood levels during
the occurrence of the base flood discharge.
(2) New construction or substantial improvements of structures shall be
elevated or flood-proofed to elevations established in accordance
I
with Article 4, Section C (9).
I
I
8ECTXON D. STANDARDS FOR,SUBDIVISION PROPOSALS.
(1) All subdivision proposals shall be consistent with the need to
minimize flood damage;
(2) All subdivision proposals shall have public utilities and facilities
I
such as sewer, gas, electrical and water systems located and con-
structed to minimize flood damage;
(3) All subdivision proposals shall have adequate drainage provided to
reduce exposure to flood hazards; and
I
(4) Base flood elevation data shall be provided for sUbdivision proposals
II and other proposed development (including manufactured home parks and
subdivisions) which is greater than the lesser of fifty lots or five
I
acres.
I
- -
---~--_.~
3'-0" CURB & ~URB & GUTTER
3' -0" TRANSITION . 3'-0" TRANSITION
FROM CURB AND FROM CURB AND
GUTTER TO 0 GUTTER TO
RAISED EDGE RAISED EDGE
fr' 6"
~
2'-~ 2'-0"
GA. D.G.T. STANDARD SINGLE WING CATCH BASIN 1033D
,
3'-0" CURB & GUTTER - 3' -0" CURB & GUTTER
3'-0" TRANSITION 3'-0" TRANSITION
FROM CURB AND , FROM CURB AND
GUTTER TO 0 ~ GUTTER TO
RAISED EDGE RAISED EDGE
f)' TRAP 6"
I
- ~ ~ :r
-
2'_0'~
GA. D.O.L STANDARD DOUBLE ,WING GATCH BASIN 1034D
'PLAN SHOWING
DETAIL OF TRANSITION
OF ,CURB & GUTTER
TO RAISED EDGE
-
NTS
CAl>:~WAlJ(ER\CURalRAH